Correct Cab Lights???

[67_C-30]

Does anydody know which and if a '67 C-30 could have had optional cab lights? My '69 C-30 has the round style (1st pic) but has raised bosses on the roof that they sit on. My '67 C-50 has the bullet style lights(2nd pic) and no bosses. I don't know if the ones on my C-50 are correct, but I can tell that they have been on there a LONG time. The amber lenses are almost white now,and the chrome is badly pitted. My '67 C-30 doesn't them at all, but I want to add whatever would have been correct for the truck. Thanks!






OR