I have one GUIDE light. This is a used bulb and has no alignment nubs, the back is black and it has a rubber around the rim. All the bulbs I saved were tested three years ago.

I also have a pair of matching GE 5040s bulbs, with the alignment nubs.

Sent you a PM with links to pics.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.