Questions on an Early Inland

[epidoc]

I just acquired an early Inland carbine in the 772,000 range. It has all the early features including high wood, push button safety, Type 1 band, correct Inland trigger housing and hammer, and flip sight. The barrel is dated 7-43.
I just took it apart. The left side of the receiver under the wood is stamped SG. The operating rod has a large S stamped on it. I know the SG designation was used by Saginaw, but wondered if it is correct for an Inland made carbine. I am also wondering about the S on the operating rod.

Information

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[Garandrew]

correct sg sub range, i have one too

[22mike]

SG made the receiver and sold it to Inland.

[ChipS]

Is the 'large S' on the inside or the outside of the box section of the operating slide? It should have PI on the inside bottom and I believe a large letter (like an 'S') on the outside bottom.