I finally got around to sorting the sockets I picked up in that Proto "Indy 500" box over a month ago (post #4,339) and here are the results after tossing the imports:

All are 1/4 drive.
Proto USA 4710-S 8-pt. 5/16
Proto USA 4716-T 12-pt. 1/2
Trutest (Proto or Challenger sourced?) 6-pt. 7/32, 9/32
Trutest 8-pt 5/16 (2)
SK-Wayne 6-pt. 1/4, 11/32/ 7/16, 1/2
SK 6-pt. 5/16, 7/16
Mustang MM606 3/16, MM614, 7/16
No-Name 1/4 hex drive "MADE IN USA" 5/16, 3/8, 7/16, 1/2
Easco 1106 6-pt. 3/16
Craftsman -G- 6-pt. 5/32, 7/32,
Craftsman -VV- 12-pt. 3/16, 7/32, 5/16, 3/8
Craftsman -V- 6-pt. 9/32, 11/32, 3/8