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Original Linen Interlocking Diagrams
from
The Federal Railway Signal Company
photo courtesy of Zachary Gillihan photo courtesy of Zachary Gillihan
The Federal Railway Signal Company
D. & H. Co.
Waterford Junction
N.Y. Interlocking Plan

Mar-22-1907		 The Federal Railway Signal Company
D. & H. Co.
Park Avenue
Mechanicville, N.Y.
Interlocking Plan

Mar-14-1907
photo courtesy of Zachary Gillihan photo courtesy of Zachary Gillihan
The Federal Railway Signal Company
B. & A. R.R.
Union St.
W. Springfield, Mass.
Tower 42
Interlocking Plan

Sept-14-1909		 The Federal Railway Signal Company
B. & A. R.R.
Grand Junction Branch
Everett, Mass.
Tower E5
Interlocking Plan

Feb-16-1909
photo courtesy of Zachary Gillihan
The Federal Railway Signal Company
B. & O. R.R.
Loveland, Ohio
Interlocking Plan

July-18-1906