A superb UNMOUNTED MINT " cylinder 29 no dot " control block of 6 with perf type B (I/P). A superb UNMOUNTED MINT cylinder 29 no B48132" is in sale since Monday, March 30, 2020. This item is in the category "Stamps\Great Britain\Elizabeth II\Pre-Decimal (1952-1971)". The seller is "bbstampsltd" and is located in Basingstoke. This item can be shipped worldwide.