2nd class Large blue Machin security definitive business sheet 2016.
This is a 2nd class Large letter Business Sheet stamp, coded M16L, first available in April 2016. Note that this is a change from the usual MAxx year code format.
In this printing the MBIL code is to the right of the ND, rather than at the lower right corner.
SG U2969 (also used for other years)
IMAGE TO FOLLOW AS SOON AS POSSIBLE.