A superb UNMOUNTED MINT control " J17 perf " example of this known but unlisted by SG. Shade variety complete with RPS certificate. We also only send to confirmed addresses. A superb UNMOUNTED MINT control" is in sale since Friday, February 3, 2017. 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.