Stevens Springfield 53B

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I'm looking for a bolt for a Stevens 53B. I've found one for a 53A model. Supposedly the only difference between the two models were the sights. Is there anyone on the board that can confirm this?

[Dadtodabone]

Model 53 same throughout production with the exception of the change to Buckhorn sights in 1936. There are 2 chamberings .22 rimfire and Stevens .25 rimfire.

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Thanks