Recently, I took my recent addition Kirby over to my where my other Kirby rests, and I started to notice some differences. They're not major differences, but they still exist, therefore I thought I'd point them out. I cannot date when they did these changes as I don't have enough machines to be able to do that, so maybe it'll be a group project of seeing what they did in different years.
For a general rule, one was made in December of 1981, and one was made in April of 1983.
First Up: Headlights:
Left = 1981
Right = 1983
The earlier models had the 80's Kirby logo carved into the plastic of the headlight whereas later ones didn't. I have noticed that on every Heritage 84 I find the headlight is like my 1983 model.

For a general rule, one was made in December of 1981, and one was made in April of 1983.
First Up: Headlights:
Left = 1981
Right = 1983
The earlier models had the 80's Kirby logo carved into the plastic of the headlight whereas later ones didn't. I have noticed that on every Heritage 84 I find the headlight is like my 1983 model.
