Looks like that wrench would be difficult to manufacture with hollow openings opposite each other, it's possible a 2 socket version was a way to sell production fallout....
Given that Wallace is a common English name, I can't help wondering if it's patented there rather than US.....
>7/8, 13/16, 3/4, 5/8. Is this a lug wrench
5/8 seems small for a lug wrench, particularly for older cars, and it seems too short to give the needed leverage, I am inclined to think something more along the lines of head bolt wrench....
Making a lot of assumptions about probable age tho....