I got my first M715 last weekend. The serial number is 30355 and the delivery date was 12-2-1968 (the date is kind of hard to read). It is a very clean rust free truck. It's painted the wrong color but the body is in excellent shape. It was a brush fire truck in South Dakota and had a big water tank in the back. The truck has just over 10,000 miles on it and it runs great!
I found it on www.jeeptruck.com. It was on an Indian reservation in Nebraska. The guy I bought it from also has a couple of 4 door dodge power wagons and a big military 6 wheel truck that looks pretty cool.
I posted a question on the psuedo zone about trailering/towing the jeep. I ended up using a silverado 2500 with a 16ft dual axle dovetail. I held it around 75-80mph for most of the trip. It worked great until the left rear trailer tire blew out and I realized that the truck I was borrowing didn't have a jack. I got it figure out though. Thanks for all of your advice on the truck/trailer combo.
First time posting pics. Hope it works alright.