Here is
a recent find, that could have been even tinier apparently. I found 8 midget combination wrenches, but poking about on my Craftsman Tools DVD, it could have been a 10 piece set. My has 13/64-7/16, different sizes on each end, but the 1970s catalog says it started at 5/32 and went to 7/16. I looked back to 1969, and it seemed to always be this set.

Here are mine, apparently missing some combination of 5/32 x 3/16, and 3/16 x 13/64 (per eBay similars). These are all -v- marked
Refusing to believe I had missed two wrenches, I started digging a little further, the 1957-66 catalogs had the 8 piece set. (The 1955 looked a bit cheaper, according the graphic, not the full marking shown here). So I now have a known era for the tools, and a complete set
And a shout out to David Maher,
[email protected] for making a great DVD where the individual catalog are real easy to navigate.