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Home Shop Entry Level Fountain Pens Gravitas - Sentry Raw Brass
GravitasSKU: GP-FP-SY-BR-11/BS-SN6

Gravitas - Sentry Raw Brass

€115,00 /
Tax not included. Shipping calculated at checkout.
5.0 (2 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Sentry Raw Brass
€115,00 /
Nib: Steel
Nib Size: Extra Fine

 
 
Description

Meet the upgraded Sentry fountain pen, the larger sibling to the entry-level model from gravitas. While slightly weightier than its counterpart, the Sentry maintains a comfortable and user-friendly design, thanks to its weighted section. With triple-start ACME cap threads, the cap effortlessly disengages in just 2.25 turns. Sentry Raw Brass comes uncoated and untreated letting it age* according to use and handling - this is a natural process of the Brass and makes your pen unique to yourself.

*due to the nature of the material this pen may arrive to have some more or less patina showing (this is not a valid condition aspect for a call on warranty or considering it used - its a reversible process that you can address by polishing this pen with a jewellers cloth and maintain it shiny)

Constructed from 304 stainless steel, the section is black PVD coated and features micro-machined grooves for an enhanced grip. To prevent marks from posting - the cap features a delrin sleeve and the upgraded Sentry series now comes with two o-rings, one on the section and one on the barrel, enhancing the experience while carrying and using the pen - preventing the accidental uncapping or untwisting of the section.

Equipped with a Gravitas-production size 6 steel nib compatible with Jowo No. 6 threads and abs plastic feeder, the Sentry offers versatile writing options, including Extra Fine, Fine, Medium, Broad and Fine Flex.

Enhancing your experience, the Sentry comes with a standard international converter provided with each fountain pen. Sentry Raw Brass is not eyedropper friendly - being a raw and exposed metal, it is not recommended to be converted to eyedropper filling system.

Elevate your writing journey with the refined craftsmanship of the Sentry fountain pen.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Gold/Yellow
- body material: Brass
- cap type: Screw-cap
- filling mechanism: Provided Converter / Standard International Cartridge
- nib material: Steel
- nib size: Extra Fine, Fine, Medium, Broad, Fine Flex
- postable: Yes
- trim: Silver color
- length overall (closed): 147 mm
- length overall (posted): 162 mm
- body length: 138 mm
- cap length: 62 mm
- body diameter: 14 mm
- cap diameter (without clip): 15 mm
- weight (overall): 88,5 grams
- body weight: 58,4 grams
- cap weight: 30,1 grams

Specifications

Brand: Gravitas
Model: Sentry
Edition:
Color: Brass
Body Material: Metal
Finish:

Cap Type:
Screw
Filling Mechanism:
Cartridge Converter
Postable:
Yes
Trim Color:
Length Overall (Closed): 147 mm
Length Overall (Posted): 162 mm
Body Length (Uncapped):
138 mm
Body Diameter: 13.25 mm
Cap Diameter (Without Clip): 15 mm
Weight Overall: 88.5 g
Body Weight: 58.4 g

Customer Reviews

Based on 2 reviews
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A
Alex
Hammer time!

I bought the pens to customize to my liking using a dremel tool for a hammered finish. Although a bit heavy (something to keep in mind, brass pens are on the heavier side) it feels great in hand and writes beautifully.

D
Destiny Smith
Unapologetically Brass

Brass was actually one of the earliest alternatives to Ebonite when fountain pens were the only game in town. As a matter of fact, many modern fountain pens (and Biro pens) still have a brass body, but they hide it under paint or lacquer. Brass is an ideal metal for pen makers, because it has a relatively low melting point, is easy to shape, and relatively corrosion resistant. But...copper has a strong smell when it comes into contact with fingers. Brass is 80%-90% copper, so you get that smell with brass, as well. The good news is that you may not care much for the smell of copper, but many microbes find the presence of copper to be absolutely fatal. And after a couple of weeks to a couple of months, depending on how frequently you use the pen, the smell will be almost completely gone. The microbe-killing part will still be there, without the smell. As far as writing with this microbe killing weapon of mass decontamination, it's nearly perfect. The Gravitas produced nib is very smooth, and it's as good as, or even better than, an equivalent sized JoWo (or Bock) steel nib. I have several Sentry pens, and the feeds on all of them are nice and juicy. If you find that your pen is too juicy, try using Pelikan 4001 Königsblau ink, which is rather dry. The metal body is free of blemishes and scuffs, but that won't stay like that for long, especially if your pen comes into contact with other metallic objects. So, if you want to keep your pens looking like new, make sure to store them in the provided carrying case when you're not actively writing with them. For me, I don't mind that scuffs and scratches, because they all add to the "lived-in" look of objects and that are not only treasured, and loved, but used daily!
Would definitely buy again.

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© 2026 Pen Venture - Passion Virtuous,

Review picture
W.
Another Great Gravitas Pen

I ordered this pen even though I’ve had some issues with two of my six Monster pens—which amounts to a failure rate of nearly 30%. One of my Monsters (black aluminum) suddenly started leaking after three months of regular use (with Artisan Pastellier Rose Cyclamen ink; it still leaks in small amounts, even though I haven’t used that ink in it for months and am now using the fountain pen with GvFC Viper Green; otherwise, the pen works reliably). Unfortunately, two service requests regarding this issue went unanswered.

The other one (TiSinX titanium) is now, unfortunately, completely unusable, as every time I fill it, large amounts of ink immediately ooze out in thick drops from the same spot (though this could be due to using Diamone Desert Rose—I didn’t initially know that such inks might cause problems). I may contact Pen Venture at a later date regarding the purchase of a replacement ink reservoir (if possible with Ultem).

I haven’t had any problems so far with the Ultem Monsters or the Gravitas Exclusive Rainbow Skittle Monster.

The Vac 2.0, which is what this review was actually supposed to be about, is another great pen. Unfortunately, the Diamine Lady Grey ink I bought along with it seems much too dry for this pen, so I screwed in the gold nib from my Gravitas x Kyuseido Kakari, and now it writes like a dream; ironically, the original nib now writes just as beautifully in my Ultemate Vac - so I guess I have to review the new steel nib separately.

The Kraken filling mechanism works extremely well again and feels almost a bit more powerful in this pen than it does in the Monster; and the new ink window is a joy as well.

It's extremely well balanced and although I very much enjoy the girthier (and heavier) monster, fast note taking is kind of more comfortable with this pen—although, purely for aesthetic reasons, I actually like the flat ends of the Monster a little better.

However, there’s a minor flaw (which definitely isn’t due to the new gold nib, since it also occurred with the original nib) that happens when the ink reservoir is full and you screw the Kraken mechanism shut. Sometimes a large drop falls onto the paper then, but I suspect this can be prevented by simply not letting the reservoir get completely full.

That aside, the pen is a pure delight.

The broad nib I orderd it with is pure delight as well. It's nicely soft and writes very consistently with my (fairly standard, I guess) 50° writing angle. The line width is very consistent, which is a nice experience, given that many broad nibs these days have stub-like characteristics. Interestingly, this nib has this kind of character when using it in reverse for very, very small margin notes—something I haven't come across before with round-ground nibs. I kind of like it.

All in all another great and beautifully designed pen - but only time will tell if it's prone to the same problems as some of the Monsters.

The ordering process and shipment was smooth and seamless as always with pen venture and I received my ordering within just a few days. Emy added a kind handwritten note, a Monster maintenance tool and vial of silicon oil.

That creates a kind of personal shopping experience—which is something, also given that the store appears to be expanding quite rapidly.

Gravitas - Vac 2.0 Aluminium | Black
★ Reviews

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883 reviews
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J
Gravitas - Vac 2.0 Grade 5 Titanium | Stone Washed
Juris
<3<3<3

I love this pen. As usual the Gravitas did not disappoint me. Perfect machining, absolutely perfect fit and finish.. this pen is another masterpiece. I love writing with it, I love the materials, and I love how much ink it holds. just pure Gravitas, what else to say.

W
Gravitas - Vac 2.0 Aluminium | Black
W.
Another Great Gravitas Pen

I ordered this pen even though I’ve had some issues with two of my six Monster pens—which amounts to a failure rate of nearly 30%. One of my Monsters (black aluminum) suddenly started leaking after three months of regular use (with Artisan Pastellier Rose Cyclamen ink; it still leaks in small amounts, even though I haven’t used that ink in it for months and am now using the fountain pen with GvFC Viper Green; otherwise, the pen works reliably). Unfortunately, two service requests regarding this issue went unanswered.

The other one (TiSinX titanium) is now, unfortunately, completely unusable, as every time I fill it, large amounts of ink immediately ooze out in thick drops from the same spot (though this could be due to using Diamone Desert Rose—I didn’t initially know that such inks might cause problems). I may contact Pen Venture at a later date regarding the purchase of a replacement ink reservoir (if possible with Ultem).

I haven’t had any problems so far with the Ultem Monsters or the Gravitas Exclusive Rainbow Skittle Monster.

The Vac 2.0, which is what this review was actually supposed to be about, is another great pen. Unfortunately, the Diamine Lady Grey ink I bought along with it seems much too dry for this pen, so I screwed in the gold nib from my Gravitas x Kyuseido Kakari, and now it writes like a dream; ironically, the original nib now writes just as beautifully in my Ultemate Vac - so I guess I have to review the new steel nib separately.

The Kraken filling mechanism works extremely well again and feels almost a bit more powerful in this pen than it does in the Monster; and the new ink window is a joy as well.

It's extremely well balanced and although I very much enjoy the girthier (and heavier) monster, fast note taking is kind of more comfortable with this pen—although, purely for aesthetic reasons, I actually like the flat ends of the Monster a little better.

However, there’s a minor flaw (which definitely isn’t due to the new gold nib, since it also occurred with the original nib) that happens when the ink reservoir is full and you screw the Kraken mechanism shut. Sometimes a large drop falls onto the paper then, but I suspect this can be prevented by simply not letting the reservoir get completely full.

That aside, the pen is a pure delight.

The broad nib I orderd it with is pure delight as well. It's nicely soft and writes very consistently with my (fairly standard, I guess) 50° writing angle. The line width is very consistent, which is a nice experience, given that many broad nibs these days have stub-like characteristics. Interestingly, this nib has this kind of character when using it in reverse for very, very small margin notes—something I haven't come across before with round-ground nibs. I kind of like it.

All in all another great and beautifully designed pen - but only time will tell if it's prone to the same problems as some of the Monsters.

The ordering process and shipment was smooth and seamless as always with pen venture and I received my ordering within just a few days. Emy added a kind handwritten note, a Monster maintenance tool and vial of silicon oil.

That creates a kind of personal shopping experience—which is something, also given that the store appears to be expanding quite rapidly.

User picture User picture
I
Fifty4T - Titan Ultem
IanM
Fifty 4T Titan Ultem - First Impressions

Emy has just sent me the 50/40 Titan Ultem. It’s a very well balanced pen made from a variety of rugged materials. This pen will outlast me, safe to say. The first and continuing impression the pen gives is its superb machining. The fit and finish is of the highest order comparable to artisanal products made in limited numbers by engineer-designers: like musical instruments, pocket knives, tobacco pipes and wristwatches. There is no feature or detail in this pen that distracts from my pleasure in using it. I respond to the common critiques of the 50/40 in the following way: (1) There is no clip. This is true. That this is a shortcoming is not true. I don’t need a clip. My writing surface is flat so it doesn’t roll off and the pen never leaves the studio so I don’t put it in my shirt pocket. (2) The Ultem material is the color of urine. I don’t see it that way. It’s transparent canary and provides a lively contrast to the titanium. If you prefer, the clear and smoked options are also available.(3) The nib should be gold. I disagree. This steel nib is comparable to premium Swedish surgical steel. There’s nuance and flexibility in its response. And the discrete etched logo is the only product marking on the entire pen (with the exception of the pen number out of a series of 250 at the bottom of the cap). (4) It’s too expense. That is an opinion not an argument. I had no problem paying the €640.

G
Gravitas - Pocket Titanium Grade 5
Geoff Goldsmith
Beautiful pocket pen.

I’m really happy with this pen. The machining on the body is really nice and the tactility of the grip is amazing. It also looks lovely.
If I had any criticism it would be that the cap doesn’t post as securely as some pocket pens but once you get used to it is perfectly useable and doesn’t affect my enjoyment of the pen.

S
Gravitas - Monster Aluminium | Black
S
Complete pile of shite

Bought a Gravitas Monster. Kept in pen sleeve in padded case. Used carefully. Treated carefully. Filled twice. Noticed ink all over my hand. No obvious problem. When home I emptied the pen and notice a thin crack in the barrel at the "turning knob" end, just before the aluminium. Now unusable. Ink seeping out. Complete waste of money. Complete crap. Either desire flaw, or poor materials or both. Watch out. Will never buy another Gravitas POS, nor from this retailer again.

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