3 January 2013 - 10p orange Machin definitive from counter sheets, with iridescent overprint.
Original M17L printing from cylinder D2 on 27/01/17 with year code was on plain backing paper.
Reprinted 26/09/17 on SBP2.
SG U2923 as used for previous years
Date blocks of 8 - 26/09/17