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Old 15th Nov 2015, 16:46
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Genghis the Engineer
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Join Date: Feb 2000
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The little arrow above the 5T looks like an "HMG property" symbol - I have the same on the back of my wristwatch

Are there any connections or markings on the reverse? What's the diameter, roughly.

Whatever it is, the thing that I find most curious is the port/stbd asymmetry.


Incidentally, I'd be willing to bet that if you put a Geiger Counter to it, you may find it's fairly radioactive. Not because it's from a reactor, but because it looks like it may have used quite a lot of tritium or uranium based "glow in the dark" paint which was quite common for some years.

G
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