VERY RARE AS CONTROL BLOCK OF 6, SUPERB COMPLETELY UNMOUNTED MINT. The item "SOMERSET HOUSE 21/2d CONTROL J DOT 17 BLOCK OF 6 SUPERB UNMOUNTED MINT" is in sale since Tuesday, June 6, 2017. This item is in the category "Stamps\Great Britain\George V". The seller is "plate-blocks" and is located in London. This item can be shipped worldwide.