This message is a couple of months old, but I figured I would add some data. I just bought a 1977 CO with the original fridge, "cata-lytic" heater, range, side dinette, and canoe overhead brackets. I weighed my truck with it on and then with it empty the next day. It had an empty 20 gallon propane tank, a single 12v storage battery, eight 2"x6"x8' boards (under for lifting up), and two 2"x6"x4' boards up front. The tare difference was exactly 1700 pounds. Empty water tank as well. I had brophy clamp mounts as well.
Given weight of accessories, corner brackets, boards, and brackets, I think that puts it pretty close to the ideal weight of 1440 pounds noted above, plus 40 years of water absorption. Though it is in pretty fair shape...