To my knowledge there was never a 57 made with less than a 4" barrel. There are a couple of variations of the Model 657, with 3" barrels. They are often generically refered to as Lew Horton Guns, although many went to other distributors that LH. I have a 3" full lug 657-4 that the production is thought to be around 200 units. It is a pre lock gun. There is another version without the full lug that had a production run in the 1000's. They are great guns, good luck with your search. Tim
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