This is just what you need to be able to operate your accessory whether it is the 153 block signal, 151 sempahore, 45 N gateman, 450 signal bridge, or the 152 crossing gate..
Introduced in 1946, the 153 is a single-pole, double-throw track activator controlled by the weight of a passing train.
Interesting fact: It was originally constructed to work with the 153 block signal. It replaced the number 41 accessory contactor.
CONDITION: THIS ONE IS A NEW MODERN REMAKE BY LIONEL USING THE SAME TOOLING/MOLDS AS THE ORIGINAL. As you can see, this one is not packaged, but it looks excellent to like new. May have a scratch or two from shelfwear.
If you need instructions, let us know upon winning--we can supply a copy.