I had a Buehler Bros stamp on the back of an M116 Gessler. IIRC, it looked like they were a news agent in the St. Louis area, but there were also a Buehler Bros dairy in St. Joseph, MO and a Buehler Bros meat market in Lima, OH at around the right time. Probably as valid a collectible as other commercial backstamps, but good luck getting a premium. I sold mine a few years back to someone who was collecting them; don't remember who.
Bill
