The TWSBI Classic fountain pen features solid colors and a slimmer and lighter design than the Diamond 580.

Originally released without the ability to post the cap, TWSBI listened to consumer feedback and redesigned the piston knob with the addition of two o-rings to allow secure posting of the cap. This is just one of many instances where TWSBI has shown their commitment to their customers and product improvement.

The TWSBI Classic fountain pen utilizes a piston filling system and is user serviceable allowing for complete disassembly with the included tools.

Pair this pen with the TWSBI Diamond 50 ink bottle for a no-mess filling solution that prevents the user from having to dip the nib directly in the ink.