Some time ago, I chanced on a nice Yankee No. 100 tool set. Readers suggested I keep watch for a No. 106 boxed set of "radio tools," which, other than a soldering iron or copper, contains about everything you'd need to build a 1920s-type radio -- and is plenty useful on later equipment.
At present, I am repairing the case, starting with the badly cracked bit holder. The two long screwdriver blades are missing, as is the uncommon Ratchet Tool Holder No. 230. They may be a very long while in the finding.