Rare, Unusual Early Rubber Alphabet Blocks party ware I am fairly certain is

I am fairly certain is Navajo based on other examples out there of similarly constructed and painted owls and other animals

This one is marked "Extra Fine Pure Bristles Sterilized" but with nothing else

4 1/2" t x 2 1/16" w x 2 3/8" d

and a few screws that attach and hold the mirror in place

I'd think a spice box--the space inside is not very large

Rare, Unusual Early Rubber Alphabet Blocks party ware I am fairly certain isI think these are way cool, and great looking, and I have never seen, and can't find, another set like them. They're made of rubber, which is pretty firm but a little squishy too, with embossed letters and numbers on all sides. I love the bleed on the green especially, and the crusty surface of the rubber all over and they sit in a great old box holder made of wood from old crates, joined with fat nails and I'm sure made for them long ago. Definitely