Schempp-Hirth toggle main switch, originally mounted in SH gliders.
Switches with losing battery connection. Use a condensator in the circuit, for example Sotecc power condensator [USV2.1].
Amp rating (amps): 20A
Switching action: Double Pole Single Throw (DPST).

Dimensions (body):
L= 33,5mm
W= 23mm
H= 35mm
Total L=67mm
Cutout: Ø12mm