Any input will be appreciated. This appears to be a 1974 model, as it has a single dot on each side of 110, and it only has 2 small headed inlay rivets. I think 1974 was the only year for the 2 small headed rivets. A friend of mine offered me $50.00 dollars for it. It need cleaned, but blade is still in very good shape. Is $50.00 a fair price? Thanks.