(DISCLAIMER: I searched before asking, I promise. Maybe I'm using the wrong search terms?)
When did the Rio Grande install rear-facing headlights on locomotive tenders? And for what reason; was it ICC regulations or something else?
I can't make out any sort of pattern:
- K-28 #474 has one in 1940: [
digital.denverlibrary.org]
- K-28 #478 has one in 1941: [
ngtrainpics.photoshelter.com]
- K-28 #473 does not have one in 1942: [
digital.denverlibrary.org]
etc...
I know that locos that did yard duty had them of course (315 in 1946): [
digital.denverlibrary.org]
Thx...