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This mystery device consists of a central wire and an outer tube with half of the circumference perforated. It is probably a radiation detector of some sort. The lettering is not clear enough to give information.
The connections are to the two visible metal parts.
The thin glass tube envelope is 9.3 mm in diameter and, excluding the base wires, is 138 mm tall.
References: Observation.


Updated June 20, 2021.
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