Hello, DH,
I'd think that some of the Craftsman collectors here could give you a date range of manufacture, going by the cast recess for the Craftsman logo plaque. (late '40's to early '50's, maybe?)
The casting shapes suggest that it might have been made for Sears Roebuck by the Columbian works. (thats a guess, tho.....I don't know that for any certainty)
cheers
Carla