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The Twsbi Obsidian Black Grey RGT Fountain Pen is a limited-edition writing instrument crafted from dark grey/black swirled acrylic resin, accented with rose gold trim, and equipped with a piston-filling mechanism for generous ink capacity. An ink window allows you to see your remaining ink level. Rose gold-plated stainless steel nib available in nib sizes EF, F, M, and B, making it versatile for different writing styles. TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance.
With a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. The name TWSBI is made up from TWS and BI. ‘TWS’ is the reversed initials of the phrase ‘San Wen Tong’, translated Hall of Three Cultures, and ‘BI’ literally means writing instrument.
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| Condition | New |
| Brand | Twsbi |
| Brand Origin | Taiwan |
| Product Code | M7445260, M7445270, M7445280 |
| Type | Fountain Pen |
| Brand Colour | Black Grey |
| Colour | Black |
| Body Material | Resin |
| Mechanism | Cap on / Cap Off |
| Cap Type | Screw Cap |
| Compatible Converter | Bottle Fill Only |
| Filling Mechanism | Piston Filler |
| Grip Material | Resin |
| Nib Size | Fine, Medium, Broad |
| Nib Colour | Rose Gold |
| Nib Material | Steel |
| Postable | No |
| Trim | Rose Gold Plated |
| Diameter (MM) | 10.3 |
| Length - Closed (MM) | 141.8 |
| Weight (gms) | 30 |
| Warranty Info | 2 Year warranty Valid against manufacturing defect only |
| Package Content | 1 Fountain pen includes a wrench and silicon grease with nice twsbi gift box |
Very conveninent to carry a pack of ink cartridges when you are on the go. Nothing better than Pilot ink cartrdiges - relatively inexpensive, intense inks.
Superb flow nice grip as smooth as butter and yet too precise
Superb craftsmanship and on time professional delivery.
Nice wet ink
Waterman Expert Mars Black GT Fountain Pen
I’ll admit I was skeptical about the Hongdian C1 at first, particularly since I rarely use fine nibs.
However, any hesitation vanished the moment I put pen to paper. The writing experience is truly charming and smooth. I’m also impressed by the included converter, which holds a generous amount of ink.
It has quickly become a staple in my daily rotation—so much so that I’ve already purchased four more! I have gifted the white one to one of my friends who also become very happy. The yellow one is hijacked immediately by my daughter!
Kudos to Online Mantra for the excellent service.
I’ll admit I was skeptical about the Hongdian C1 at first, particularly since I rarely use fine nibs.
However, any hesitation vanished the moment I put pen to paper. The writing experience is truly charming and smooth with a very satisfying feedback.
I’m also impressed by the included converter, which holds a generous amount of ink. It has quickly become a staple in my daily rotation—so much so that I’ve already purchased four more!
Kudos to Online Mantra for the excellent service.
Really nice one. Exvellent ink supply
Very nice converter
Fine
In my collection, this is a second pen I have purchased and i think it is one of the best pen rather other costlier ones..
Also th flow of ink and smoothness of the click nibs are awesome..
BEST WISHES !
It’s a nice pen with butter smooth wet nib over all a bit large pen but verz comfortable in my hand grip is also very ergonomic for long writing
Diplomat Traveller Black Lacquer Gold Fountain Pen
I used it on Pelican highlighter edition pen. Impressed with its butter smooth writing. It's module is easy to assemble. Very happy!!
Very good.


