The frame cracking issue was mitigated with a change around 1919/1920. It was due to shooters using heavier new loads. Of course you have no idea who has fired what in a hundred year old gun.
I think the change was at the same time the grade 1 1/2 was designated as a 1.
The 20s are nice guns if you get a good one that fits (or you are one of those who can fit yourself to a gun). Mine has become a favorite upland carry shotgun
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"If there is a heaven it must have thinning aspen gold, and flighting woodcock, and a bird dog" GBE
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