This is the spring used for the "helping hand" part on the trap.
Vintage Mouse Trap Spare Parts HELPING HAND SPRING Replacement Ideal MB Games
Mouse Trap Board Game Spares 1960's Version
Ideal Vintage Mouse Trap Board Game 1963 Edition, Complete Set with Instructions
Vintage 70s Ideal Mouse Trap Classic Board Game Complete Good Condition Retro
Vintage 1986 Mouse Trap Board Game Milton Bradley 100% COMPLETE
Vintage 1975 Ideal Mouse Trap Board Game 95% Complete
