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Had a little more time to look this evening. If you go to http://www.fiberglassics.com/library/Wellcraft you'll see a bunch of model years, except 1972. I'm gonna' say the model number you can't quite see on your plate reads 'RB 15V' in full.
Wellcraft is still in business, so it might be worth an email or two to see if they have any brochures or such available to help you put her back together.
Definitely check out the restoration section of the forum.