Pretty sure the 82 is the manu year for the service replacement, I have an XG lying around with an 88 which would be about the time it was purchased new. Not sure if they went to the last two digits of the year in the 70s or 80s. At some point they probably realized they needed to differentiate between the decades. The part label also looks like what was used in the 80s. I might have a picture of it, if so will post it later.