Parker Duofold No.10 Nib. (Medium) N561 £20.00 Out of stock. Summary; Manufacturer: Parker. Designation: Duofold No.10 (Junior Size). Origin: UK. Material: 14ct Gold. Dates from (approx): 1960. Overall Length: 25mm. 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!