A new printer, Bradbury Wilkinson, was chosen for the job of producing these next two series: The fourth series was printed, but never issued, and according to all records, the fifth series was never printed. The sixth series, together with the 1 and 5 pound notes of the second series, were used in Berlin up to December 31, 1979, when they were finally withdrawn. On February 14, 1991, The Ministry of Defence auctioned off their stock of 17 million uncirculated vouchers from the 2nd, 3rd, 4th and 6th series to a consortium of dealers.