need help with identifying 1920 com.

I recently inherited what appears to be a 1920 commercial

in exceptional condition 99 percent blue and maybe 85% straw with the only pitting on the trigger face with 2 clips one unmarked and the other with a four digit # not the same as the gun both plain wood but the one with the #'s is a lot darker the gun has the crown n proof and original wood grips with great lookig checkering

the serial # is 19 with all matching #'s the only 2 things I can't figure out are on the front of the frame and on the barrel below the serial # is an o in cursive

and in the well below the chamber is what appears to be an A

or v inside a circle and a heavily stamped j also it appears to be 30 cal and the barrel is a little less than 4 in. It is all in a cardboard box that appears orignal and has a cleaning rod and partition for the 2 clips


thanks for any help on further id and approximate value


Gary C.