| Model, CO | |
| Signal Company: | Union Switch and Signal Signal Company |
| Style: | T2 (three position, upper quadrant) |
| First Patent: | 1914 |
| Status: | Most exist in CO and NM (now extinct from KS) |
| Original RR: | AT&SF RY |
| Current operator: | BNSF |
| Installed: | Late 1920's |
| Photo location: | East end of Model siding, CO |
| Photo angle: | Facing East, Amtrak Engineering Special |
| Time: | 8/10/1999 |
| Photo by: | Michael M McGowen |