Mint never hinged block of 12. Full perfs and I can see no separation. Clean, with no defects or faults.Horizontal line on scans is just the mount I scanned it in. The item "Great Britain KGVI 1939 £1 Brown Arms Fine Margin Block x 12 SG478c Mint MNH" is in sale since Monday, March 22, 2021. This item is in the category "Stamps\Great Britain\George VI". The seller is "thestampbook" and is located in Dereham. This item can be shipped to United Kingdom.