3 January 2013 - 1st class Large red Machin definitive from counter sheets source code MAIL.
The 1st class Large counter sheet was reprinted on 14/02/18 by ISP Walsall, and was distributed by Royal Mail Tallents House on 23/05/18. Phosphor reacts with a blue glow under ultra-violet light.
Options available (if your choice is out of stock please ask):
Singles or multiples
Cylinder blocks of 6
or Date block of 8 - 14/02/18
SG number - U3003, previously U2960b