Vintage National Benzole Enamel Key Fob Pair - 1950s/1960s R. Sculthorp. Possibly remounted with the leather or FAUX leather? being in such good condition but there is a small amount of rust on the rings?

I haven’t seen the pebble pattern on the back before on similar age key rings. I would love some advice. I would of thought they was modern-ish without the stamp on the right key ring