I'm pretty sure the thing centered in the 1st photo is an old breakaway switch (as Jim said) that's missing some parts.
The thing centered in the 2nd photo looks like it might be the remains of some sort of built-in level indicator, if the 2 channels cut in it once held bubble tubes. It looks a bit heavy-duty for a level, though.
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— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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