One of the last interstate signs in Idaho with the state name on it. (Photo by Joe Koehler).
Embossed cut-out US highway marker from Idaho - probably from the 1930s. (Collection of Robert Edgar).
Current style Idaho state route marker. This sign was offered on Ebay some time ago (Owner unknown).
An older style black on white state route marker. This style sign was used from the late 1940's into the 1960's. It is still used on big green sign assemblies, but not as freestanding reassurance signs. This particular sign is probably from the 1960's given the fact that it has a Scotchlite reflective background (Photo by Joe Koehler)