Need Additional Information

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I just purchased what I believe to be a 1977 Four Winns boat. I'm trying to get additional information on the boat, but seem to keep coming up empty. On the side of the boat was a crome tag that reads Apache 10. Can anyone tell me how to find addtional information to verify if in fact this is a 1977 Four Winns?

Thanks for any information I can get.

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