As my search for a build sheet continues I removed the back seat on the hunt, while I did not find what i was looking for these turned up. On the rear seat cushion like the front seat bottom I did find the tag that links this seat to the car and the built date of March/19th/71
I also found a sales receipt for the Moose Jaw Army & Navy Store dated Feb./14th/76.
I know this car was bought in Regina by a lady from Moose Jaw and has spent all it's life in Moose Jaw this just adds more proof to the story.