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Technical difference between 65 "A Model" and 67 "B Model"
I like to know exact differences between 65 A model 337s and 67 B model 337s. I have been told there are some internal differences but what are they and in what systems of these two models. I don't need vague answer but a thorough explanation. Thanks
Last edited by AP AVM : 08-10-16 at 11:40 PM.
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