1920's 4x4 trucks

[Richard Coutts-Smith]

This pic is doing the E-mail rounds at the moment, circa 1920's, looks like some brand new trucks with a choice of solid rubber tyres or pnuematic. Any ideas on make or country?
Who can afford 20cents a gallon.....
Not normally my field of interest, but I do like this piece of history.

Source is "Shorpy", marked in bottom corner.
Rich.