Vintage 50s/60s deadstock Kay-bretta faux leather gloves

This is for a pair of off-white faux leather gloves made by Kay-Bretta. They have never been worn and have the original tags. There is no materials tag so I am not sure what these consist of. They just feel like pleather to me. Tag says "with the real leather look" They only have a very slight stretch. Says they fit 7, 7.5, 8. Also a B on the tag. There is a pinkish looking mark on the top of one glove where it was laying against something for years. The edge also looks like it was laying on something green. See last photo. I have not tried to clean them.