3336 Kansas Street
This was the last year (or nearly so) that Douglas & Wolfe did business. In 1945 R. G. Wolfe carried on alone with an altered version of this same stamp, then got his own stamp made sometime between 1946 and 1949.
3336 Kansas Street
This was the last year (or nearly so) that Douglas & Wolfe did business. In 1945 R. G. Wolfe carried on alone with an altered version of this same stamp, then got his own stamp made sometime between 1946 and 1949.
2000 block 36th Avenue
As always, Frank Salamid marks have no standard configuration. Compare this to my other example from 1944.

3408 Mirasol Avenue
Both Riding and L. B. Duffin laid concrete on this block, but it has no Duffin & Riding marks.