Mark sent this picture of the place (He has pictures of EVERYTHING! )

The 1966 phone book lists "Sloan Junction Service; Sloan NV"

The Pomona Public Library site, which has an online collection of Frasher photo postcards says the postcard is from Sloan Nevada in 1950. Sloans Service isn't listed in the LV listings in our 1950 phone book. The 1950 book lists Sloan, but just says call long distance...so not helpful.

Here's what Wiki says about Sloan... Sloan is an unincorporated community in Clark County, Nevada. It contains well-preserved petroglyphs and several hiking trails that allow visitors to photograph the petroglyphs. It is located just south of Las Vegas on Interstate 15.