Came across this holster and can't find much info. Did find the B08 model was a lined duty holster for a 4" N frame. This is unlined and for a 6" revolver. A K frame fits very snugly and it would take more force than I would care to use to squeeze in a N frame. It looks a lot like what motorcycle officers wore in the 50's/60's but I think it is newer than that

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46 is the size code for a 6” Colt Python, Official Police or a Trooper. I don’t think they made that model holster for very long.
Regards,
turnerriver

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turnerriver