mid-century machine age vintage porcelain sign letters, art deco lettering

Large sign letters (about 5" tall over the letters, not counting the tabs beneath) with great deco moderne lines. These have been used (we don't know what these spelled, but there are a lot of possibilities and combinations!) and have soil, and some chips.

These are made of a heavy unglazed porcelain material, we don't know if they were made to be weather-proof or not, but would not suggest them for outdoor use if you have freezing in the winter, just to be on the safe side.