Red marker lamp.
This is the Coleman Fleetwood original marker lamp. It features a slightly different radius on each corner that was a Coleman and Fleetwood design.
Late model darker units such as Element and Evolution series would likely have this red marker lamp. Black base lamps are typically found on these pop ups.
This lamp has a red lens and a black base.
Replacement bulbs can be found here
Comes complete with base, lens, lamp base, and incandescent filament bulb.
Measures 4 inches long by 2 inches tall.
Part number 4714J08581