| Material | Brass |
|---|
Check the listing for details. Vintage Brass Sensor Switch. Listed at 2.99 USD. Please see pictures. It looks like brass to me, however I don’t know for sure. This device was probably used to detect a door opening or something similar. The contact is two spherical spring loaded space where an insulator is used to open the contact. The base appears to be phenolic material. Note there is some corrosion. Looks to be made in Japan.
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