Mausers "3's"

[wlyon]

Reading LugerVerns reply in yesterdays post on numbers, where Dwm 3's are normally rounded and Mausers are flat topped. It seems on Mausers this is true except for the 3 on the frame. It is, at least sometimes, different than the rest of the number 3 on the firearm. This is true on mine and others I have looked at with a 3 in the serial number. The 3 on the frames is rounded. Any idea why? Bill