Likely predates the 70s. I think I recall single red lights centered at the peak of the roof on each end, as far back as the time I started hanging out at the Frisco in Fort Smith (sometime in '69). Upon my retirement in '18, the GCOR rules were still requiring a red light at the end of train at the prescribed times.
Looking around on the archive, some of the cabooses (cabeese?) have a large bulb with a red lens in the ends of the lower roof. Others seem to have some sort of small class light lamps on top of the cupola like Andre described. See the following. Small Lamps http://frisco.org/mainline/wp-conte...oose-1718-location-unknown-in-August-1976.jpg http://frisco.org/mainline/wp-conte...ssouri-in-July-7-1978-R.R.-Taylor-768x660.jpg http://frisco.org/mainline/wp-conte...-Missouri-on-August-19-1978-R.R.-Taylor-b.jpg Large Lamps http://frisco.org/mainline/wp-conte...-Missouri-on-December-31-1979-R.R.-Taylor.jpg http://frisco.org/mainline/wp-conte...-Missouri-on-August-10-1986-R.R.-Taylor-b.jpg
Thanks for the pics. I certainly remember the large single lights at the ends, not sure I have definite mental images of the other version. I think we'll find that hanging oil fired marker lamps went out during the late 1960s, likely right before they started doing away with oil fired switch lamps. Andre
