I bought my Henney Packard Junior ambulance a few years ago from the estate of the prior owner. After I bought it, I was informed that the same fellow had also owned another Junior which was one number away from mine. So he'd had sequential numbers. Unfortunately, the other was sold before I bought mine, and I don't know who bought it or what shape it was in. But it must've been better than mine, else the other buyer would have bought the one I now own first. And if it survived from '53 to '90, it must still be around now.