This one is mounted by central coach bolt and dished disk plus rubber disk.
In use the bolt is vertical and when amp is carried it is horizontal.
I should say I've seen the result of an amp set for USA use used on 240V ,
extensive areas of bare copper due to lacquer melting or burning off and
large amounts of smoke damage.


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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/