OK here are the photos I took of the GE sealed beam headlights. I noticed that the driver and passenger side have slightly different markings on the lenses, which is strange..... bear with me, there are a few pictures showing all the details:
Driver's side:

'2D1' at the 12-o'clock position:

'GENERAL ELECTRIC' and 'SEALED BEAM' at the 6-o'clock position:

'USA' and 'DOT' at the 11-o'clock position:

'ZA76' at the 1-o'clock position (there may be an 'S' above the Z but can't be sure):

'GENERAL' and 'SEALED' (same on both headlights):

'ELECTRIC' and 'BEAM' (also same on both headlights):

Now the passenger side headlight:

'2' at the 12-o'clock position (not '2D1' as the driver's side):

'USA' at the 11-o'clock position (missing the 'DOT' that the driver's side has):

'SZA60' at the 1-o'clock position:

What are your thoughts on these - anyone else have headlights like these on their Camaro?