Another Circle S, the mystery is safe, more questions!

[Norme]

Hi Dwight, I have no opinion one way or the other about the subject pistol, but I would like to correct one point. There is a legitimate 1921 property mark, it is very rare, and in my opinion was likely applied in error by an armorer shortly after Jan 1st 1921. The example shown below is on a P08 Navy (4" barrel), one of a rare 150 gun contract made in 1913/14. There is no reason to believe that the 1921 was applied by some booster as it certainly does not add to the gun's value.
Best regards, Norm