Hello Brokencase, Asifahmed,
Neglected to respond to your comments;
Valve Cover Sticker - I checked my label and could not find anything resembling a date code (main digits are; 8A930AC). The Merkur Shop Manual identification section shows a completely different style of label and all the references do not align at all.
Strut Tower - could not find any sort of stamp or date reference.
I was recently speaking to the second owner (I'm the fourth), and he purchased the car in 2015 from the estate of the original owner. The OO titled the car on July 8th, 1988 in Fremont, CA (as in California not Canada). This would lead me to believe it was manufactured in the Spring (??) of 1988.
I will contact Rotunda as Asifahmed suggested and see what they come back with. I will update this thread when I have additional information.