Found this on ebay. This appears to be the original envelope the parts and service manual (TM10) would come in.
Text at the bottom appears to be the standard:
"General Motors Truck & Coach"
"Division of"
Yellow Truck & Coach Manufacturing Company"
"Pontiac, Michigan"
Manual envlope
Manual envlope
I got a Mountain Cur and a ~~pitbull~~ big loveable cuddle puppy and a Brown Husky aka 'Golden Dragon'
RIP Kimber 5/26/2022
RIP Yeager 1/3/2019
RIP TJ 3/25/2014
RIP Sugar Bear 8/29/2014
RIP Shilo 4/10/2015
RIP Yuki 2/19/2017
RIP Kimber 5/26/2022
RIP Yeager 1/3/2019
RIP TJ 3/25/2014
RIP Sugar Bear 8/29/2014
RIP Shilo 4/10/2015
RIP Yuki 2/19/2017