3 January 2013
12 x 1st class Royal Mail Red booklet , source code MTIL, year code M12L
This stamp has a very different appearance to the others issued on the same day, even the MSIL version, with a paler head. On these examples the iridescent layer is quite faint.
Printed by Walsall Security Printers
SG catalogue number MF7 (also used for later years)
Available with or without cylinders W5 W2(p) W1