Hallo. ime trying to find a motorcycle we rode at the farm next door in the early 1960s its a royal enfield 700cc single cylinder. Girder forks so it must be before 1943 when girder forks phased out.The owner told me its a constellation and they were made for the yanks who wanted a bigger bike to go from base to base.you had to turn the bezel on the mag to retar to start then back when started it had lights & regulator. Painted black. 4 gears Could it have been made at Bradford on avon at the quarrey where enfield moved to in the war.Aney information please,email me. Regards graham davies.