Frame numbers are usually stamped on the left side of the frame towards the top near the triple tree. Some BSA & Triumph models had frame numbers near the front engine support - check your frame and engine for identification numbers.
Triumph 650 Unit Twins Engine & Frame Numbers (1963-1968) Below you will find both Triumph engine and frame numbers for Triumph 650 unit twins from 1963-1968 and a Triumph 650 models list from 1963-1968. Frame and engine numbers will be the same assuming they match as they would of when they left the factory. If your frame numbers or Triumph engine numbers do not match, you can still use this system to date each frame and / or the engine.
Vintage BSA Motorcycle Engine & Frame Serial Numbers Decoding.
Triumph 650 Models (1963-1968) Brand Model Triumph 6T (Thunderbird) Triumph T120R (Bonneville) Triumph TR6R / TR6SR (Tiger / Trophy Sport) Triumph T120C / T120TT Triumph TR6C / TR6SC (Trophy) Engine & Frame Numbers (1963-1968) Year Starting Number Ending Number 1963 DU101 DU5824 1964 DU5825 DU DU13375 DU DU24875 DU DU44394 DU DU66246 DU DU85904 DU90282 Triumph 650 & 750 Unit Twins Engine & Frame Numbers (1969-1983) In 1969, Triumph added a two-letter prefix to the actual engine number in order to indicate the month and model year - but not the actual year of manufacture. In 1981 when the coding system would have been repeated, a third letter (A) was added to distinguish the number from the previous years. Triumph 650 & 750 Engine & Frame Numbers (1969-1983) Example: T120R ED56946. E (Month) = May / D (Year) = 1970 First Letter = Month Of Manufacture Second Letter = Model year Of Manufacture A - January C - 1969 B - February D - 1970 C - March E - 1971 D - April G - 1972 E - May H - 1973 G - June J - 1974 H - July K - 1975 J - August N - 1976 K - September P - 1977 N - October X - 1978 P - November A - 1979 X - December B - 1980 DA - 1981 DA - 1982 EA - 1983 Triumph 350 & 500 Unit Twins Engine & Frame Numbers (1957-1974) Below you will find both Triumph engine and frame numbers for Triumph 350 and 500 unit twins from 1957-1974 and a Triumph models list from 1957-1974.
Frame and engine numbers will be the same assuming they match as they would of when they left the factory. If your frame numbers or Triumph engine numbers do not match, you can still use this system to date each frame and / or the engine.
Triumph 350 & 500 Models (1957-1974) Brand Model Triumph T21 (Twenty-One) / 3TA / T90 Triumph 5TA Triumph T100A Triumph T100C / T100SC Triumph T100R Daytona / T100S Triumph T100SS / T100SR Engine & Frame Numbers (1957-1969) Year Starting Number Ending Number 1957 H101 H760 1958 H761 H5484 1959 H5485 H H11512 H H18612 H H25252 H H29733 H H32465 H H35987 H H40528 H H49833 H H57083 H H65573 H67331 In 1969, Triumph added a two-letter prefix to the actual engine number in order to indicate the month and model year - but not the actual year of manufacture. Engine & Frame Numbers (1969-1974) First Letter = Month Of Manufacture Second Letter = Model year Of Manufacture A - January C - 1969 B - February D - 1970 C - March E - 1971 D - April G - 1972 E - May H - 1973 G - June J - 1974 H - July J - August K - September N - October P - November X - December BSA 500 & 650 Unit Twins Engine & Frame Numbers (1962-68) Below you will find BSA engine and frame numbers for BSA 500 & 650 unit twins from 1962-1968.
Frame and engine numbers will be the same assuming they match as they would of when they left the factory. Many early BSA A50 & A65 unit twins prior to 1966 left the factory without matching engine and frame numbers. If your frame or engine numbers do not match, you can still use this system to date each frame and / or engine. In 1969, BSA (exactly like Triumph) added a two-letter prefix to the actual engine number in order to indicate the month and model year but not the actual year of manufacture. Example A65 Lightning BC56946.
B (Month) = February / C (Year) = 1969 First Letter = Month Of Manufacture Second Letter = Model year Of Manufacture A - January C - 1969 B - February D - 1970 C - March E - 1971 D - April G - 1972 E - May G - June H - July J - August K - September N - October P - November X - December BSA 250, 350, 441 & 500 Unit Singles Engine & Frame Numbers (1959-1973) Below you will find BSA engine and frame numbers for all BSA unit singles produced from 1959-1973. Frame and engine numbers will be the same assuming they match as they would of when they left the factory. Many early BSA unit singles prior to 1966 left the factory without matching engine and frame numbers. If your frame or engine numbers do not match, you can still use this system to date each frame and / or engine.
Hi,new member here looking for a bit of advice. I recently inherited a couple of air guns,and one in particular i'm a bit puzzled about. I know it's an airsporter, and after doing some research i think it's an airsporter mark 1. This would make it about 60 years old,but i can't really believe it's that old because it's condition is near mint. The other issue is that there are absolutely no identification marks on the gun whatsoever-not bsa,airsporter,not even a serial number.i even took the action out of the stock but there's nothing. Has anybody got any ideas as it's really puzzling me. I would post some pics but i'm not sure how to.
Hiya Mitch, and a very warm welcome to Planet Airgun. Yes, a few pics would be helpful in making an identification if you could please. A bit of a descriptive for ya to be going on with in the meantime though.is that the Mk1 Airsporter had a two piece stock that was glued together at the pistol grip, just above the trigger. The only differences between a Mk1 and a Mk2 is the later has a 'flip-up' rearsight (my memory might be wonky though, and it's the other way around). I'll check in my Hiller book later to see if there's any other distinguishing info that might be helpful.
Hi Mitch, the Mk1s and the Mk2s had the serial numbers stamped in front of the trigger guard. The stocks on both the mk1s and 2s were composite, made of three pieces, however there were some special one off's that had a one piece stock I believe manufactured by a spanish company. (the stocks) The stocks had no rubber recoil pad fitted as in later variants.
Most Mk1's had no method of attaching a scope (no rails) although there were a few later ones and those that were modified by owners/gunsmiths. Mk1 had the turret fixed rearsight, the Mk2 had the flip down type - both fixed by dovetail into the action. The Mk1 barrel was a forged one piece affair and is the only Airsporter with a tapered barrel - all others had the parallel barrel that was sweated into the action. Hope this helps!
Air sporterman.
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