85187 Tillig elite track : Shift Track HO/HOm Narrow Shifts Left to Right Code-60 An audio frequency filter is

An audio frequency filter is integrated within the main locomotive PCB to ensure each speaker responds within it’s ideal frequency range

and because there was still much life left in the Mk1s by the mid-sixties

Construction is top quality with a ceramic heater element

Two further lots were built in 1925 and 1932 by Churchward's successor

Detachable couplings in NEM pockets

85187 Tillig elite track : Shift Track HO/HOm Narrow Shifts Left to Right Code-60 An audio frequency filter isHO HOm relationship changes with this track, the Narrow gauge moves from the left to the right side of the standard gauge. (Guarded transition with no moving blades).