The truck on the left is unique. I can't say I've seen one like that before. Military surplus perhaps?
Try the TV show "Emergency!" That is a Ward LaFrance rig, similar to the pumper the show received in the third season. The two show rigs are now in the L.A. County Fire Museum. This one, from a Louisiana parish, is fairly close to the one in the photo, except for the light bar vs. the bubble gum machine light.