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The TWSBI Diamond 580 is the 21st Century interpretation of a classic writing instrument. 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 | M7441190, M7441200, M7441210, M7441220, M7441230 |
| Type | Fountain Pen |
| Brand Colour | Caribbean |
| Colour | Blue |
| 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 |
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.
The steel nib of diplomat can compete with some of the best high end gold nib fountain pens in the market. Its ultra smooth. Try medium or broad nibs.
Fill it up with a wet ink like Pilot Iroshizuku and the effect is spectacular
One of the best colors in the current Iroshizuku ink lineup. A modern classic dark brown with purple undertones. Was packed and shipped well.
Leuchtturm1917 Drehgriffel Nr. 1 Gradient Navy/Mint Green Ballpoint Pen 372936 (Limited Edition)
The pen is very smooth and gentle. I am loving it.
Sailor 1911 Fude De Mannen Blue GT Fountain Pen [****]
Verity nice pen. Feels nice to hold. Good finish and quality. In fact I found it bethe than platinum plaisir. I hope click confessed out worthy similar such models
The pens i received from onlinemantra were scratch free & strong built


