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