From the Empire Pencil Corporation, vintage No. 2470 Soap Eraser, still in perfect, working condition. Soap erasers were so-named because they were made to erase thoroughly, cleanly and with minimal abrasion. These erasers still function perfectly well (we enjoy using ours) but if you simply want to admire its fantastic typography, that works, too. 

Single eraser

.5 x 1 x 2"