Tuesday I had errands to run in the nearest large town. I stopped by the Restore and found some interesting items.
The old 1/2 square drive sockets in the back row all have the same dimpled knurl, where there is no peak to the knurl, and the lines made by the knurl are all at the original surface level. Sizes are: 8-pt. - 11/16, 4-pt. - 5/8, 6-pt: 9/16, 11/16, 25/32, 7/8, 15/16, 31/32.
Ward's Riverside 1/2 dr. 12-pt. 11/16, 3/4, 7/8 sockets, Indestro supplied.
Powr-Kraft 1/2 dr. 12-pt. (Wright) 7/16
None Better T1214 1/2 dr. 12-pt. 7/16 "Chrome Alloy"
None Better T1228 1/2 dr. 12-pt. 7/8
SK B40826 1/2 dr. 12-pt. deep, long relief for Buick spark plugs "Not Guranteed"
SK 'Wayne 40160 1/2 dr. extension
P&C:
6018 1/2 dr. 12-pt. 9/16
2820 DOE 9/16 x 5/8
Barcalo DOE 5/8 x 3/4
Indestro 44009 combo 9mm
Dayton 4X150 "V" combo 13/16
Fairmount combo 9/16
Motion X24 combo 3/4
Proto USA 1212L long combo 3/8
Proto LA 5340 1/2 dr. 12-pt. deep 1/2
Proto USA:
1/2 dr. 12-pt. R-2795 deep 5/8 (shallow broach with 1/2 square broach below it)
1/2 dr. 12-pt. 5318 deep 9/16
1/2 dr. 12-pt. impact 7/16
1/2 dr. reducer to 3/8
3/8 dr. 6-pt. deep 5020H 5/8 (2)
3/8 dr. 6-pt. deep 5016H 1/2 (2)
3/8 dr. 12-pt. deep 5016 1/2
3/8 dr. 12-pt. deep 5014 7/16 (2)
3/8 dr. 6-pt. deep 5012H 3/8 (3)
3/8 dr. 12-pt. deep 5012 3/8
3/8 dr. 12-pt. 5212 3/8
3/8 dr. 6-pt. 5218 9/16

The knurl on the old sockets matches that on the one I picked up earlier in the month:

The pricing was way higher than it used to be. I hope this was just an experiment, or the checkout person (who seemed inexperienced) wasn't willing to make a volume discount like usual.
That Proto R-2795 broaching looks like this:

It must be for a special application.