SPDT= Single Pole Double Throw. Miniature Toggle Switches. This is a 2 position switch which stays in the position you switch to.
Gaugemaster GM508 SPDT Miniature Toggle Switch
Gaugemaster GM510 SPST Miniature Toggle Switch (On-Off-On)
Mini Miniature Toggle Switch Model Railway SPST SPDT
SPDT Miniature Toggle Switch on-off-on Centre Off Model Rail Hobby 6g ED22
4PDT Miniature Toggle Switch on-off-on Centre Off Model Railway 5669 12g ED02
5 Pcs SPDT Miniature Toggle Switch on-off-on Center Off Model MTB-SPDC 26g ED22
