1st class Large deep scarlet 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. The first printing has phosphor reacting with a blue glow under ultra-violet light.
A second printing too place on 30/07/18. This also has blue phosphor, but not as bright, and also has yellow fluorescence to the transparent security ink, although less bright than the 2nd class Large printed the same day. See photo comparison.
Options available (if your choice is out of stock please ask):
Singles or multiples
Cylinder blocks of 6
or Date block of 8 - 30/07/18
SG number - U3003, previously U2960b