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Original Linen Interlocking Diagrams
from
The Standard Railroad Signal Company

The Standard Railroad Signal Company N.Y.C. & H.R.R.R. Western Division Depew Interlocking Sept-9-1898	The Standard Railroad Signal Company N.Y.N.H. & H.R.R. Plymouth Division Tower E.S.-Brockton Dec-11-1896
The Standard Railroad Signal Company C.C.C. & St L. R.R. Springfield, Ohio No 78 June-27-1898	The Standard Railroad Signal Company C. Vt. Ry. Burlincton, Vt Jan-1902
The Standard Railroad Signal Company Erie R.R. East Buffalo, NY June-1901	The Standard Railroad Signal Company Erie R.R. Passing Siding East of Owego Diagram of Signals No. 288A July-31-1899