I looked through some of my automotive lamps and I found what appears to be a old unlabeled automotive lamp. It may be a 40's GE or a GE Mazda 1023(? sorry, it was hard to see). It says Made in U. S. A. upside in the middle of the base. The etch is almost impossible to see and I will post a picture if you need to see it.

I can see the word Mazda over the GE logo but the number may have been rubbed off. It could be 30's but I don't don't know. Pre-1946.