June 2015 - 1st class red Machin definitive from retail booklet of 12, year code M15L, source code MTIL with Security Backing Paper
First reported June 2015 in supplies were not generally available until October.
SG number U2968e (has been used for other years).
At the beginning of February 2016 booklets were found with the new printed backing paper. These have the 2015 year code O15R. Future printings in 2016 are expected to have the O16R year code. Some booklets may be available.