There are at least 3 versions of the base, the wood one, the cast one with round ends, and a cast one with flat ends. The only one I have any date info for the the square end one, which is listed in a 1944 catalog I have. Listed as set T23, with 7 regular drivers.
A seperate listing for individual drivers lists 11 sizes tho, so you don't get them all.
Set includes: #3406,3408,3410,3411,3412,3414,3416
Last 2 digits are the size in 32's
Allthough the catalog lists them under Walden, and calls them 'Walden Spintite Socket Wrenches' , the base is clearly markes 'Stevens Spintite Wrenches'
There are also at least 4 versions of the handle design, and the pictures I have don't match between the set and the individual driver shown. Variations include, non ribbed handles, shallow ribbed handles, and fairly deep ridged handles (stanley style).
There are also 2 variations on the taper into the ferrule, almost none, and a long taper about 1/3 the handle length. The set in my catalog shown both ferrule types in the same set however, so it may just be a function of shaft size...
(Matches Jim's set, wiuth 2 untapered, 5 tapered)
Tho, I am not certain, I syspect that these were also made in both light varnish, and a dark (stain?) finish, as I have seen fairly dark ones that don't appear to be just stained/dirty, however, it could be just old varnish turning dark...