I can't confirm this, but I believe that the last year for glass lenses were 1954. I had this info somewhere, but can't find it at this time. Guide had converted to plastic for most if not all GM products by 1954. There may be some tail lights out there that have the glass lenses on them beyond 1954, but I don't think they came from the factory that way. (Tim where are you?)
The bullet lights also converted to plastic.
Trivia question:
What is the differences between these two lights? (Hint: compare the bases)
What would be different if this was installed onto a 1955/9 suburban? (Hint: clamshell gates were larger in the TF years)
What parts would you need to convert a station wagon light to fit a Suburban? (Hint: The suburban clamshell gates had a more prominent curve)
Did all of the clamshell lights have glass lenses? (Hint: What was the last year for glass lenses on any GM product?)
