Here is a patent of the AE750 made by G.A. Long in 1921.
It was one of the very earliest 3 slot payphones
Printed on Parchment paper. Suitable for framing.
Here is a patent of the AE750 made by G.A. Long in 1921.
It was one of the very earliest 3 slot payphones
Printed on Parchment paper. Suitable for framing.