Chris, If S'G' had 30,000 plus receivers already made by IP in both of the serial number blocks assigned to IP, then why would they need receivers so early on as it took them about three months production to use up the IP receivers they had on hand. Then there is the question of S.G. being able to make enough receivers for themselves as well as the contract for Inland having enough production to send receivers to S'G' about July 1943. Just thinking out loud here. I have IP # 1773553 with a 1-43 Underwood barrel on it if that helps.
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