6 x 1st class deep scarlet MSIL retail booklet reprinted with M18L year code on SBP2
This booklet appeared in May 2018 a used copy of the stamp being reported before a source of booklets was found locally. This printing of the Padlock booklet is on SBP2.
Printed by Walsall Security Printers, source code MSIL, year code M18L.
The SG catalogue number is expected to be MB18 as used for previous years.