£2.55 Garnet Red Machin Definitive self-adhesive stamp printed by Walsall (International Security Printers)
Non Visible Change made available from 14th January 2021
Formerly printed by De La Rue in 2017
Please note: the M21L security code shown in the image is only indicative of where the iridescent ink is printed and is determined by the year in which the stamp is printed. This is not necessarily the code you will receive.