I don't have a bulb in it, It was broken when it was brought up. (The ship went through an Atomic blast.) And it was in somewhat deep (for us) water.
But it looks the same - just the insulation is a bit flaky - someday soon I plan on mounting it and another lamp I have plus three portholes.
Mart> Is the base size a standard medium thread base or is it larger, as in a > mogul base?