Mark Vogel: Basic Railway Signals in Austria
Mark Vogel: OBB Signal Identification Plates
Mark Vogel: OBB Distant Signals
Mark Vogel: OBB Main Signals
Mark Vogel: OBB Speed Indicator Signals
Mark Vogel: OBB Protection Signals
Mark Vogel: OBB Shunting Signals
Mark Vogel: OBB Brake Signals
Mark Vogel: OBB Repeating Signals