N623 - Conway Stewart 58 Duro Broad Nib £45.00 Out of stock. 0 in your basket View Basket Checkout Summary; Manufacturer: Conway Stewart. Designation: 58 Duro. Origin: UK. Material: 14ct Gold. Dates from (approx): 1955. Overall Length:28mm. Writing Width: Broad. 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!