Parker 51 Nib. (Extra Fine) N590 £28.00 Out of stock. 0 in your basket View Basket Checkout Summary; Manufacturer: Parker. Designation: 51. Origin: USA. Material: 14ct Gold. Dates from (approx): 1949 (Date Coded). Overall Length: 22mm. Writing Width: Extra Fine. 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!