N431 - Onoto #3/ST Fine Flex Nib £25.00 Out of stock. 0 in your basket View Basket Checkout Summary; Manufacturer: Onoto. Designation: #3/ST. Origin: UK. Material: 14ct Gold. Dates from (approx): 1940. Overall Length: 25mm. Writing Width: Fine Flex. 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!