2017 marks the 50th anniversary of the issue of new Queen Elizabeth II definitives featuring Arnold Machin's iconic bas-relief sculpture which replaced the Wilding definitives. Arnold Machin's 1967 portrait of Queen Elizabeth II (sometimes referred to as the Machin head) has been reproduced over 200 billion times.
Royal Mail issued two miniature sheets and a prestige stamp booklet (PSB).
The Prestige Stamp book contains two panes of Machin definitive stamps in various guises.
Pane 3 has 'make-up' values:
1p, 2p, 5p, 10p, 20p and 2nd class in the current colours.
50p and £1 in 2007 colours, alhtough the £1 has iridescent printing wiht year code of M17L and source code MPIL
All have elliptical perforations. All have two phosphor bands except for the 2nd class which has one central band. The stamps are printed in gravure by ISP (Walsall), and all except the £1 are regarded by Stanley Gibbons' catalogue editors as already existing and so not needing any new catalogue numbers. However, the head on these is quite whiter than many previous gummed elliptical gravure versions.