Mark Vogel:
The Washington Terminal Company 1925
Mark Vogel:
Washington Terminal - Bridge Signals
Mark Vogel:
Washington Terminal - Color Light Signals and Road Signals
Mark Vogel:
Washington Terminal - Ground Signals
Mark Vogel:
Washington Terminal - Automatic Signals
Mark Vogel:
Washington Terminal - K Interlocking
Mark Vogel:
Washington Terminal - A Interlocking
Mark Vogel:
Washington Terminal - C Interlocking