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Any 16/17 hull that has those eleven 3B Stencil numbers.

Some models ended in the 1975 model year so they won't have those numbers.
The Sakonnet or Newport models might have one of those numbers but not positive.
http://www.whalercentral.com/userphot...owstart=20

Some new 1976 17' Sport models may have those numbers.
http://www.whalercentral.com/userphot...lbum_id=46

Here is one 1976 Sport 17' with a 3B0417 stencil number and was made in October of 1975 as a 1976 model. HIN BWCB6104M76C and has the newer Smirked Hull.
http://www.whalercentral.com/infusion...r_id=11876