Wow, I have been hit with some tough ones this week!
I have a hunch you have been searching far and wide online to come up with a clue on these - I did the same and found nothing.
I suspect the answer will come from a collector of oil or petroleum related objects - search around using these terms: automobilia, petroliana, petroleum collectibles
The glass bulb screwed into some larger object with the threads facing down...possibly the innards of a early gas pump?