Was wondering what models guns this size Bucheimer holster was made for? My father used to carry his old S&W pre-10 nickle plated, pearl handled revolver in it. Seemed to have a slightly loose fit. Looks to be for a 5" barrel. My recently aquired CDC trade-in Model 10-10 fits, but is also a little loose. I actually carried my Model 629-3 5" 44 Mag in it for a while but is definitely too tight.

I think B8 is a model number, not a size number. Sizes are usually
something like 12, 24, 32, etc... Are there any other numbers besides
B8 on the back? If not, perhaps a photo would help us help you.
If the K frame is too loose and the N frame too tight, it could be a
K frame with adjustable rear sights. Do you have one to try? Or
perhaps a Colt OP which would fit about the same.

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http://smith-wessonforum.com/gun-lea...75-1956-a.html

Perfect Fit holster chart from about 1964:

B = Black

8 = Colt Off. Pol., 5”, S&W Mil. & Pol., 5”

This makes sense. So if sized for a 5" M&P, then that fits the Model 10's right? I might have stretched the holster with the 44 mag 629. Oh well. Thanks for the info.

If it is supposed to fit the Colt OP it would be loosey goosey in the M&P.
M&P is now K Frame with fixed rear sight. S&W K frame with adjustable
rear sight, like a Model 19 for instance, will fit a holster designed for a
Colt OP.
P.S. The very early M&Ps offered a target model that did have the
adjustable rear sight, but the ones that you describe have the
fixed rear sight.

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