1928 SA/RIA small parts ID help

[madcratebuilder]

I have a SA build on a RIA receiver, 426263, 8-28 SA barrel. War2 bolt. I have questions on the metal furniture, front band has "H" stamped under the bayo lug. Rear band has a "U" stamped on the right side center. The rear sight has "IA", very small, near the front.
1/4 inch "S" stamped on front of fore-end, I think this is a war1 RIA S stock.
Correct or mixmaster?

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