The parts are genuine Otto product. The detailed technical spec is found in the website below;

http://www.ottoexcellence.com/search/default.aspx?keyword=T9-MS1-21

SWITCH, MIL,STD BUSHING 1 POLE, ON-OFF-ON/MS24523-21

DIMENSIONS:  1.2630"W X 0.6125"TH X 2.3290LWEIGHT: 0.992OZ.

Order 1unit=2ea switches