Interesting items found in butt trap

[vintage hunter]

Looking to find out some information about this pair of tags found rolled up in a plastic tube and stored in the butt trap of a No.4T I recently acquired. One has the rifles s/n and the other an oval stamp but all I could make out is the date Apr. 1975 and an S or 5, it also has ''field standard'' hand written on the back side. Thanks, VH

Information

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