15 February 2017 - Windsor Castle prestige stamp book and retail booklet first day cover
In addition to a set of 6 stamps and a miniature sheet, Royal Mail also issued a retail booklet and a prestige stamp booklet. The definitive pane from the PSB includes 2 x 2p, 2 x 10p, 3 x 1st class and 1 x £1.05 gummed definitives all coded M16L MPIL. The £.105 and 10p appear to be no different to those included in the Beatrix Potter PSB earlier in 2016 (see here
). The 1st class red was included in the Queen's Birthday PSB, but that was the original red shade, and these are the new darker (deep scarlet) colour.This Royal Mail first day cover has the pair of Machin definitive stamps (2p and 1st class) from the prestige stamp booklet with ordinary gum (MPIL M16L), and the 1st class self-adhesive stamp (MCIL M17L) from the mixed-content retail booklet, cancelled with the Windsor Castle (Round Tower) special postmark.