We need someone with a post 34 Catalog to show when Zenel became an option for these wrenches.
In 1934 the following sets were offered.......
Box Wrench Set No 31 comprised 7/16 thru 3/4 so there should be more of these examples to be found
Box Wrench Set No 33 comprised 7/16 thru 15/16
Box Wrench Set No 34 comprised 7/16 thru 15/16 with 3 small DBE
One would have had to do single purchases for 25/32, 1, 1 1/16, 1 1/8, 1 1/4