N621 - Conway Stewart 3N Medium Nib (3 ratings) £25.00 Out of stock. Summary; Manufacturer: Conway Stewart. Designation: 3N. Origin: UK. Material: 14ct Gold. Dates from (approx): 1940. Overall Length:21mm. Writing Width: Medium. Notes: All sizes and measurements are approximate. Any replacement nib may need some adjustment when fitted to the pen. We can fit this nib as part of a service on your pen, email us for details. Postage in the UK is free on this item!