Mine is GA10 862 / DA10R 9964, May 1963. Dredged up from the River Mersey in 1980. One owner from new (yes, really!). Awaiting restoration. Just starting work on this bike. RRT2 gearbox restored by a well known restorer in Coventry, shafts and most gears OK, main body fixed, inner cover OK, outer cover replaced (same as STD).