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The frame number stamped into the right side of the headstock should NOT match your engine/gearbox/certification label. The frame is most likely original. Starting around May 75 the numbers all matched but yours is Feb 75. The label was red when it left the factory. They are attached with hammer-drive screws, not rivets.Look here: https://gregmarsh.com/MC/Norton/Info/CommandoSurvey.aspxYou'll find quite a few examples of Feb 75 machines near yours. BTW, the frame numbers have no logic to them (that we can tell) prior to them matching the engine number.Not sure what "T" you are talking about but if it's has to do with the gearbox, don't think about it anymore - has no useful info. There are also numbers near the bottom rear of the crankcases that just say that they are a matched pair - again no value.
The frame number stamped into the right side of the headstock should NOT match your engine/gearbox/certification label. The frame is most likely original. Starting around May 75 the numbers all matched but yours is Feb 75. The label was red when it left the factory. They are attached with hammer-drive screws, not rivets.
Look here: https://gregmarsh.com/MC/Norton/Info/CommandoSurvey.aspx
You'll find quite a few examples of Feb 75 machines near yours. BTW, the frame numbers have no logic to them (that we can tell) prior to them matching the engine number.
Not sure what "T" you are talking about but if it's has to do with the gearbox, don't think about it anymore - has no useful info. There are also numbers near the bottom rear of the crankcases that just say that they are a matched pair - again no value.
