
Asbestos lamp gasket?
Took down an industrial light fixture in an old factory and this was the gasket between the light base and the glass shade. The light base is most likely pre-1950's above a small engine that likely produced heat.
Might be too hard to tell from the picture, and not worried about exposure - just genuinely curious. I don't plan on lab testing as I left the gasket and only snapped this picture.
Thanks in advance!