Re: AVO high voltage meter (EX British Rail)
Ian
The plate has been lost but is a Avo Heavy duty with a single knob in the centre
The reset button is a twist to the right to reset the mechanism has an elongated loop with a corresponding second loop and and a pin that fits in the reset mech
If I pull on the reset the indicator in the bottom of the display
Changes from red to clear
So any help would be appreciated
As I say my late Dads
Also converting his line side lamp to a modern LED
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