A superb UNMOUNTED MINT " IMPERF " error horizontal pair. We also only send to confirmed addresses. A superb UNMOUNTED MINT IMPERF error" is in sale since Friday, February 14, 2014. This item is in the category "Stamps\Great Britain\Elizabeth II\Machin Definitives".The seller is "bbstampsltd" and is located in Basingstoke. This item can be shipped worldwide.