Good question....could be any number of things, ie, barrel condition at time of inspection, sight height, general inspector number, barrel thickness....your guess would be as good as anybody's at this point...
Odd that they are the same number, opposite sides of the barrel, one in line and the other obviously done in a hurry, by different people and not lined up. The pistols are from the same factory and same year. Inspector #3, #4 and #9.....? Any guesses?
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