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Booklet of 4 x 1st class Large with year code MA15 and source code MFIL with Security Backing Paper
Printed by Walsall Security Printers
A new booklet was issued on 31 July 2014 with changed
telephone numbers on reverse 03457 740 740 and 03456 000 606
The booklet was reprinted for 2015 with year code MA15 and appeared in March. The cylinder numbers are
W3 (red) W1 (iridescent) W2 (phosphor). The cylinder numbers are obscured by the front cover when the booklet is closed (see image).
At the beginning of February 2016 booklets were found with the new security printed backing paper. These have the 2015 year code MA15.
SG GB 2016 Concise catalogue - NEW NUMBER ALLOCATED RB5 which is also used for stamps coded M16L