TWSBI Diamond 580AL fountain pen

The TWSBI Diamond 580 AL Iceberg is a fountain pen with a piston filling system. It is made of transparent polycarbonate, with silver-colored details. The cap is smooth, while the barrel is faceted. The transparent barrel allows for a clear view of the piston mechanism and the ink level. The TWSBI logo is located at the top of the cap.

The TWSBI Diamond 580 fountain pen features a polished stainless steel nib with the TWSBI logo, available in various sizes.

TWSBI fountain pens can be completely disassembled for cleaning and maintenance. Instructions and the necessary tools are provided with each TWSBI fountain pen. Note: the disassembly option is only for experienced users and is not necessary for normal use. Disassembly is at your own risk!

With a history of over 40 years of production, including the manufacturing of high-end pens for other brands, Ta Shin Precision has decided to sell under their own brand, TWSBI. The name TWSBI is composed of TWS and BI. TWS' are the reversed initials of the phrase 'San Wen Tong', translated Hall of Three Cultures, and 'BI' literally means writing instrument.