2nd class Large blue Machin security definitive business sheet 2017.
This is a 2nd class Large letter Business Sheet stamp, coded M17L, printed 14/03/17 and first available in August 2017.
In this printing the MBIL code is to the right of the ND, as last year.
SG U2969 (also used for other years)
NO HEADERS AVAILABLE - SORRY.