Hello,
This is my first post. I'd like to know if any of the resident experts here can help me identify this old bulb that my dog found in some boxes of trash that were put out on the street. I was immediately struck by how heavy it was. As you can see, it works great. There are no markings that I can see on the bulb or the base. I assume this is an old darkroom bulb. Any info would be great. I collect antiques but i don't know much about antique light bulbs. Thanks in advance!