There is no Model 732 in the S&W line that I am aware of.
This is correct since the 732 is a Harrington & Richardson (H&R) revolver. The confusion probably comes from this model's chambering for the .32 S&W round which isn't branding but just a designation of what cartridge it uses. "AL" serial probably means early 70's and the value depends alot on the condition, but probably not much more than 200-300 bucks for great condition.
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