Eastbound train - Polo, Mo. - Rock Island - Milwaukee84 views
Single signal location No. 23.1 between No. Eaton and Grafton, O., Looking South - Big Four RR84 views
Signal location 364.5 - P.R.R. about 6 miles west of Warsaw, Ind.84 views
S.B. Milwaukee freight passing through automatic interlocking at Knowles, Ill. N.B. home signals in foreground - Milwaukee - Illinois Central crossing84 views
Highway cross. signals at N.B. home signal for El Dorado, end double track - P.R.R.84 views
Spring switch installation on the C. M. St. P. & P.84 views
HC-100 Highway Crossing Signal84 views
PV-250 AC Vane Relay84 views
N.Y.T.A. Flushing Line Installation84 views
Schmitt General Purpose Trigger Board84 views
Test Set for 504-B and 504-C84 views
Train Graph (Right Side View)84 views
Logan - Monitor83 views
Cabin Creek "KD" Interlocking83 views
Jackson Street - Merriam Park83 views
Moseby Jct.83 viewslooking west Rock Island-Milwaukee - CTC installation
El Reno CTC machine83 views
East Buffalo - River Jct.83 views
Hadley to Van Loon83 views
B-30 Panel (Bauru-Cabina Inst.)83 viewsBrazil
Oliver Iron Mining Div. - B-30 Panel83 viewsMinnesota?
C.A. to N.83 views
Mexican Gov. La Griega to Mariscala83 views
Mexican Gov. La Griega to Mariscala83 views
Mexican Gov. La Griega to Mariscala83 views
Mexican C.T.C. equipment83 views
Montreal Installation office Code Rack83 views516A-Multiplex Code Control System
Montreal Installation Office Coding Unit83 views516A-Multiplex Code Control System
Montreal Installation Field Coding Unit83 views516A-Multiplex Code Control System
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