These stamps are on Rumsey Avenue just north of Michigan, alongside the Church of the Resurrection complex. There are one or two more E.R. Premoe stamps along that stretch besides these, but my hands were getting cold.
This is a plainer stamp than the other E.R. Premoe version, though the tradeoff is that it is easier to read. The date shows that the business continued on for a good while after the death of Earl R. “Lefty” Premoe.