![]() ![]() Nice to know the bike and I are the same age. ![]() near the gas valve with the model number, date of manufacture and serial number. I plan to restore it as the rust has bitten the paint too much for it to be a pleasant patina. Specialized Bicycle Components Recalls Aerobars Due to Fall Hazard. The late date would acount for the style of makers badge, and the paint under the botttom bracket where it has been preserved by oil and mud is deep bronze green, a colour usually thought of as post war. One may assume that RA serial numbers began with RA00001 (or RA1000), and continue until RA 99999 N, at which point the system was reset to RB 00001 N (or RB 10000 N). Hi Paul, you can never have enough info, so if can pass anything elso on I would be interested, a PM would do fine or on here. If you require any more information please let me know. The last mark of military bicycle was the Mark V & Mark V*. A MK V1 model does not exist however a number of collectors and dealers are continually advertising there machines as a MKV1. In regard to frame numbers I have three sequences which are for different contracts listed in my frame number register - 3 or 4 digits and and six digits with the letter N or NP. Note: Some of the mid-60s straight guage 531 frames had serial numbers starting with a single letter which was towards the end of the alphabet. ![]() From my archives it was introduced in 1952/53 and to date I have traced at least four contracts. Hi Your machine is to give its official designation is a Bicycle Trade Pattern Heavy Duty.
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