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Twsbi Diamond 580 ALR is the 21st Century interpretation of a classic writing instrument. While most of our modern communication devices lack transparency and customization, the TWSBI Diamond 580 excels with a transparent resin construction that can be disassembled using the included wrench. The Diamond 580 represents the fusion of a traditional fountain pen with a modern industrial design. The result is an eye-catching writing instrument that is simultaneously appreciative of the past and relevant in the present. The modern writer can appreciate the stainless steel nib's smooth writing quality, the high volume ink capacity, and the ability to take good care of their pen. The Diamond 580ALR has an aluminum grip section and piston rod to add substantial style to this fountain pen. The matte grip section and cap top ring feature concentric, ringed engravings. The internal piston-filling mechanism holds about 2 ml of ink and can be completely taken apart for thorough cleaning. Instructions and silicone grease are also included to aid in the maintenance of the pen.
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 | M7441340, M7441350, M7441360, M7441370, M7441380 |
| Type | Fountain Pen |
| Brand Colour | Affogato Onyx |
| Colour | Brown |
| Body Material | Resin |
| Mechanism | Cap on / Cap Off |
| Cap Type | Screw Cap |
| Compatible Converter | Bottle Fill Only |
| Filling Mechanism | Piston Filler |
| Grip Material | Aluminium |
| Nib Size | Extra Fine, Fine, Medium, Broad, STUB 1.1mm |
| Nib Colour | Black |
| Nib Material | Steel |
| Postable | No |
| Trim | PVD Plated |
| Diameter (MM) | 13 |
| Length - Closed (MM) | 142 |
| Weight (gms) | 31 |
| 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 |
Nice pen
I have two pens of same company
Click
And both have medium return on their nibs
But the blue pen is a fine nib pen, not a medium nib
The pen is a smooth writer, very well balanced,feels premium
Hongdian fountainfountain pen is a beautiful pen in terms of it’s make, design and functionality
nice pen
Parker Aster Matte Blue GT Fountain Pen
….
Very nice pen
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.


