253 BLOCK CONTROL SIGNAL
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|Built from 1956 until 1959. This is simply the block signal version of the train control mechanism from Lionel's 115 and 132 passenger stations with automatic train control. It is the only Post-War signal to have a train control function built in, as opposed to depending on a 153C contactor. The 253 includes insulated pins for 0 and 027 track to create an insulated block. 1956 to 1957 versions have a black painted base. Includes envelope with insulating pins for 0 and 027, two CTC lock-ons, three wires, and a 253 instruction sheet.
17556EX 253 BLOCK CONTROL SIGNAL -> C-7 Excellent - Minute nicks or scratches; no dents or rust.
17556-2LN 253 BLOCK CONTROL SIGNAL -> C-8 Like New - Free of blemishes, nicks or scratches; original condition throughout; very little sign of use.
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