BLOCK INSTRUMENTS 1977
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COLWYN BAY BLOCK SHELF LAYOUT 1978
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COLWYN BAY SB DIAGRAM 1981
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COLWYN BAY SB DIAGRAM 1985
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SIGNALBOX - JUNE 1974
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SIGNALBOX DIAGRAM 1977
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SIGNALBOX DIAGRAM 1991
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SIGNALBOX DIAGRAM OCT 1980
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SIGNALMAN FRANK GRIFFITHS - 1977
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