Extremely rare - I can find no comps or even any history that these existed.

Comes from a smoke free home.

In great condition - I don’t see any major stains or marks, if there are any I have photographed them for transparency. They are very minimal and you have to look pretty closely to see them.
The elastic in the fitted sheet seems intact, there is no sound or feeling like it is crumbling or wearing (those that know elastic know what I am talking about.
Questions? Ask. No returns.