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It often wasn't actually the case with Triumphs for instance 1977 Triumph model year began from GP (June 1976) and 1979 model year began at HA (July 1978) and continued until December 1979 and there are other years that didn't begin in August. [URL unfurl="true"]https://www.britbike.com/technical/triumph_serialnumbers.html[/URL]
It often wasn't actually the case with Triumphs for instance 1977 Triumph model year began from GP (June 1976) and 1979 model year began at HA (July 1978) and continued until December 1979 and there are other years that didn't begin in August.
[URL unfurl="true"]https://www.britbike.com/technical/triumph_serialnumbers.html[/URL]
