A superb UNMOUNTED MINT control " Q20 imperf " block of 6. A scarce multiple complete with RPS certificate. We also only send to confirmed addresses. A superb UNMOUNTED MINT control" is in sale since Thursday, November 20, 2014. 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.