N541 - Parker Duofold #25 Medium Nib (2 ratings) £25.00 Quantity: at £25.00 each Add To Basket Summary; Manufacturer: Parker. Designation: Duofold #25. Origin: UK. Material: 14ct Gold. Dates from (approx): 1960. Overall Length: 25mm. Writing Width: 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!