CLICK ON THE BLOCK SHELF ELECTRIC KEY TOKEN INSTRUMENT INFORMATION & CCT DIAGRAMS FOR TYERS No 6 & 7 INSTRUMENTS

CLICK ON THE GROUND FRAME FOR INFORMATION ON THE KEY TOKEN INSTRUMENT TRAIN DIRECTION INDICATOR

CLICK ON THE RAILMOTOR FOR A TYERS No. 12 TOKEN INSTRUMENT & DESCRIPTIONS OF ALTERNATIVE METHODS OF SIGNALLING SINGLE LINES eg WITH NSKT INTRUMENTS & SR TOKENLESS BLOCK