Going to have the opportunity to look at some commercial blue pre WWII Colt pistols. While I'm aware that Colt used an oven blue finish that is difficult to duplicate, would like to know other or additional telltale signs that may indicate a refinish or restoration, specifically on blue pistols. Some of the restorations are quite good these days.

Have heard different things from different collectors over the years. For example, and in particular, grip bushing stake marks should be in the white. Plunger tube stake marks should be in the white. Colt polished the feed ramp after the finish was applied and should show white metal with traces of blue. There should be browning or traces of rust in the original finish. Edges and markings should be sharp. These are some of the things I've heard through the years. Perhaps there are others?

Also during the pre-war years were there certain traits that applied to earlier produced pistols vs. later ones or should these telltale signs apply to all? Thanks.
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