MICRO SWITCH V3-15
Manufactured by Micro Switch in the USA as their type V3-15, these are a best quality industry standard pattern Microswitch.
Used by Hewlett Packard in their test equipment, spare part 3101-0200.
Normally open and normally closed contacts (so SPDT or SPCO) rated at 15Amp 250VAC (1/2 HP) contacts have short solder tag connections. Quite strong - 14 oz operating force
Dimensions are 28mm x 16mm by 10mm wide.