Anyone Know what these Proof marks means?

ihaveonequestion said:
i have no idea what they mean, i can't find anything on google about it. was hoping someone could help. One is the letter "K" and the other one appears to look like a female symbol
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Constriction
Choke (American designation) Constriction Identification (Stars)
Skeet 2 (light Mod.) 0.38 mm (0.015 in)
Modified 0.51 mm (0.020 in) *** (3 stars)
Improved Modified 0.635 mm (0.025 in) ** (2 stars)
Full 0.76 mm (0.030 in) * (1 star)
 
so i didn't see any marks for smokeless, even though 1932 seems late for black powder only. is it black only? someone told me also that it's safe to use mini shells with smokeless in them... not sure how true that is, but thought i should bring it up.
 
That O with a star above it is the inspectors mark. The mark is for Charles Watrin who was at the proof house from 1928 to 1965. The star has nothing to do with choke designation on this gun. In fact, your gun is marked choke 18.2 which means that the nominal bore size at the time made was 18.2 mm and the word choke in front of it is just signifying that the gun has some degree of choke but does not give the constriction. You would have to measure the bores and the muzzles to know what they actually are.
I think the letter K has something to do with the barrels at the time they were struck. I've had Belgian guns with that same letter K.
 
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