I bought my 53 from my uncle before he passed. The truck has been in the family since 1956 so I didn't want to let it get away. Never knew or had any reason to ask about the first three years of it's life mostly because it wasn't mine. That changed a little after I purchased it but my uncle soon died after the purchase and I figured any history of the truck had died with him. It sat for about ten years before I started the rebuild and was in the process of removing the cab and behind the gas tank, along with most of the other stuff mentioned in these threads, was a dirty faded envelope. Not expecting much I ripped it open to see what had laid there for the past half century and low and behold there was a PA change of address form identifying the origional owner, year and serial number of the truck and his electrical contractor business. No doubt he filled it out in 1953 laid it on the back of the seat it slipped down behind the gas tank not to be discovered for 55 years. It's in a frame on my shop wall now.