“Brooks Sample Blue" - Mercury Convertible Pocket Fountain Pen / Rollerball with clip

This is my Mercury Pocket Pen that easily fits into the breast pocket or notepad pen loop. This pen is designed to accept standard international cartridges. Material: Carolina Pen Company "Brookes Sample Blue" One-Off formula NOTE: This pen can also be optionally delivered with a Schmidt Rollerball Option in 0.5 or 0.7 that takes standard International cartridges. Fountain Pen Technology / Cartridge-Rollerball-System - schmidttechnology.de This option is a Rollerball nib that is interchangeable with the Fountain Pen nib. Addition of the Rollerball nib when a Fountain Pen section has been ordered is $10. 11mm cap threads 120mm capped length 111mm uncapped length  Approximately 150mm posted Nib Choice of: Jowo #5 Nib Housing, Feed and Nib Schmidt #5 Housing, Feed and Nib Ships with converter Priced with Jowo or Schmidt Nib (EF, F, M, B, 1.1) Steel Bock #5 Titanium nib available for extra charge