These tracks activate when the locomotive center-rail slider presses and activates a switch to close a circuit - that action can activate a switch or a signal. These are from the 1990's and appear to have never been used. Hollow-formed nickel-silver rails may need to be polished.
There may be a few spots of minor rust that need to be removed. Please see the closeup pictures.
Shipping is by USPS 1st class mail - postage INCLUDED in the sale