Most likely, this is a 1953 3100 truck with an original 6v electrical system, and an add-on turn signal switch/system.
The original 6v front parking/driving lamp bulbs would have been single filament, but these can be easily converted to dual-filament bulbs - for parking/driving and turn-signals.
The original single rear-lamp housing would have had a dual-filament bulb (for brake light and marker/tail light); and, a matching rear-lamp housing/unit/bracket for the other side is readily available.
Also, as extraneous information, 6v dual-filament LED bulbs (for pos and neg ground) are now readily available.
If all bulbs are LED, an LED flasher-unit would most likely be needed.
