vintage Shotgun Headstamp Identification

Hi all, I was out detecting last Tuesday for my first outing on a farm house built in 1923. I uncovered two of these within a half of a foot apart. they were about 8" deep and under an old dead walnut tree. If anyone can tell me a range of years, I would greatly appreciate the help.
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Answers
Thank you @Bayard1908, that took care of it. I appreciate you help.