- The Atlas O 21st Century Signal System represents a quantum leap in model signal operation and design. These realistic signal structures provide indication of the switch position for train travel.
- Modeled after a "dwarf" signal with red and green aspects.
- Circuit boards included for each signal.
- Designed for use with all O scale switches.
- Use for switch indication only or incorporate these signals with the Road Signal System (ato6934) for complete signal operation.
- Detailed installation instructions.
