If it's from 1911 and marked "Police" anywhere, it would have to be either a Police Positive 38 (.38 New Police = .38 S&W) or a Police Positive Special, the same small frame somewhat elongated and strengthened to accommodate the .38 Special. Both slick little guns, and in good to very good condition with undamaged hard rubber stocks not out of the ballpark at $475, although not exactly a screaming bargain.