Is it possible that these were post war conversions for Govt agency, Prison guard, State, or Commercial, etc use?? Especially,
With the Model 12 having the USPS stamp in the receiver and stock? The 12 having the Full marked barrel then struck CYL????
And I know pics would help.... Any thoughts on post war conversion for Commercial/civilian or Govt use???? Especially, if these were surplus.....

Thanks,
Huck