Product - see also detailed description
15 February 2017 - 1st class deep scarlet Machin definitive from Windsor Castle mixed retail booklet of 6.
The first red MCIL stamp to be issued in 2017, is in the new deep scarlet shade, and has code M17L, source code MCIL
SG number U2968ba - new number for new shade.
Booklets also available - see PM55
Available from 15 February, not before.