A superb UNMOUNTED MINT control " G15 perf " block of 6 with the listed variety break above' O' of' FOUR'. Row 19/2 complete with RPS certificate. We also only send to confirmed addresses.A superb UNMOUNTED MINT control G15 perf" is in sale since Friday, April 1, 2016. This item is in the category "Stamps\Great Britain\George V". The seller is "bbstampsltd" and is located in Basingstoke. This item can be shipped worldwide.