Correct on the tail light spacer, the fact that it had the 1955 tail light threw me - yer honour. More details from the auctioneers Lot 50 – ‘A 1954 Ariel Square Four motorbike, 1000 cc, registration No. DS 6552, with V5, frame No. KR444, engine No. PL351. Odometer showing 12051 miles. The bike was ...