T-3 Headlights 1956 to 1972 
- 1956 7" T-3 In center, large lettering at bottom
- 1957 7" T-3 In center, smaller lettering at bottom

==>  Switched over from two 7" bulbs in 1956/57 to four 5 1/2" bulbs in 1958
- Lo Beams on outside for Lo & Hi Beam, and Hi beams on the inside
 
- 1958-59 Guide over Triangle in center
 
- 1960-67 Guide at bottom,T-3 In center of bulb without lines
- 1968-71 with vertical lines,
- 1972 Triangle removed, T-3 moved to bottom. 

NOTE: Called T-3 because tilts down 3 degrees and to the right 3 degrees. Used 3 alignment pins.  Made by Guide Lamp company in Anderson, Indiana. For more information on the Guide Lamp company click on www.charleswbullock.com/Guide/Index.html


Video Link with further explanation: https://youtu.be/pEmltAXO0cY

1960-67 Headlight: T-3 In center of bulb without lines   

1968-71 Headlight: T-3 In center of bulb with lines   

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