Kurt -
Stellar job!
I finally got around to reading your report.
Here's the info off the original deluxe belts in my 02C Los Angeles built '68 Z/28...
Right front shoulder belt clip:
Hamill 1968
Model #177
52 E 67
Left front shoulder belt clip:
Same as right front shoulder belt clip.
Right front lap belt retractor:
Hamill 1968
Model #137
1 E 68
Left front lap belt retractor:
Same as right front lap belt retractor.
Right front seat belt buckles:
Hamill 1968
Model #137
1 E 68 (this belt is on the bottom)
Hamill 1968
Model #177
52 E 67
Left front seat belt buckles:
Same as right front seat belt buckles.
Rear seat belts: (Note: All six belts have the same info on the tags)
Hamill 1968
Model #131
50 E 67
Kurt, do you have any idea what the the letters and numbers stamped into the buckles and clips stand for? For example, the right front lap belt retractor clip has "981" stamped on it while the left side retractor clip has "H348" stamped on it.
Thanks again for your research!
Paul