Rare vintage never used 5 set B&W enamel pots w/4 lids - $40 (Eugene)

This set is part of the unsold inventory of a rural Washington state general store.
The store opened in the 1930s and closed several years ago and there is no way to know exactly when this set was made, but most likely in the 1960s or 1970s.
Due to age and storage there is some rusting on a few of the edges, but they were never used.
The small, medium and large pots are intended to nest.
This is a rare set and I haven't been able to find anything like it in my research.
Photos don't capture the deep black and white of these pieces.
Measurements: 1 small pot at 8 1/2" diameter edge to edge with a 6 1/2" opening diameter.
5" tall.
No lid.
2 medium pots at 9 1/8" diameter edge to edge with a little under 7 1/2" opening and 5 1/2" tall.
Lids for both.
2 large pots at 10 1/2" diameter edge to edge with a 8 3/4" opening diameter and 6" tall.
Both have lids.
r All height measurements are without lids.