12 October 2017 - Star Wars retail booklets.
Issued as part of the mega-series to mark the release of yet another Star Wars film these booklets each contain two self-adhesive special stamps and 4 x 1st class Machins.
Unlike the Windsor Castle and David Bowie booklets issued earlier in the year, the backing paper is SBP2. And one is inverted in relation to the other, which is important for anybody collecting stamps on both types of paper.
However, on examples seen so far, the backing paper on the blue book is all one way, and the brown book is the other way.
SG numbers expected to be PM57 & PM58 but we don't know which will be which.
Cylinder numbers available in both books.