Agreed, but no idea.
This is by no means definitive, but this is what a quick catalog sweep looks like...
BONNEY | YES, first introduced in 1941, offered through at least 1957
Blackhawk | YES, first introduced in EDIT: 1937, No. 34997, steel handle, no photo
Blackhawk (cont'd) | NONE listed in 1943, 1948, and 1953 (Note: They did offer it in the 7/16-drive Nugget size, No. 39976, in 1948)
Cornwell | NONE listed in 1946
Duro | NONE listed in 1935, 1940, 1946
Herbrand | NONE listed in 1937, 1942, 1948
MAC | NONE listed in 1946, 1947, 1951, 1952
New Britain | NONE listed in 1940, 1953, 1955, 1958 (Husky)
Plomb | NONE listedin 1933, 1935, 1939, 1941, 1949
Proto | NONE listed in 1952, 1956, 1962
SK | NONE listed in 1943
Snap-on | YES, first introduced in 1941
Thorsen | NONE listed in 1935
Walden | YES, first introduced in 1941
Williams | NONE listed in 1937, 1941, 1947