Irwin style on left, Russell Jennings style on right.I had a handfull or two of bits from grandfather. I purchased a few to fill in missing sizes.
The smallest size in each set is 3/16”, very rare.
I think the 1”, largest in right set, is very old, maybe first issue, as it is marked with patent date, 1885 and “cast steel”.
Expansive bit on left marked Irwin, on right Craftsman.
Box of twist drills with brace shanks is Wards Master.