Markings and small plate on Type 30 stock

[BBB.ACB]

Recently got a Type 30 at an auction to add to my very small collection and was wondering if anyone has seen the stock with this small plate on it:

Attachment 21636

Also has the number 47 (year maybe?) in red on the other side:
Attachment 21630

And 47 is stamped on the receiver behind the bolt:
Attachment 21635

Some more pics of it

Attachment 21634Attachment 21633Attachment 21632Attachment 21631Attachment 21629

Information

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