If it is indeed a Commander, it would be a 1969 model. The boat was transferred to the Corsair Division in 1970 and was marketed as the Corsair XK-19 from 1970 - '75. Both V-Drive and Stern-Drive Commander models were available in 1969, and as Corsair models in 1970. Later Corsair models ('71-75) were all Stern-Drives (for what it's worth).
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