This is more catfighting fetish material than spanking, but there’s no ignoring the mighty wallop with that huge vinyl belt to the bare breasts!
I do love some of that black-and-white fetish porn from the 1960s. New enough to be hot instead of quaint, but old enough to be different. This one came in (complete with penciled adult-magazine layout-marking marginalia, not shown) via alt. binaries. pictures. erotica. vintage with a filename suggesting that it had been harvested from an eBay auction.