Thanks, Mike!
Even though Sandow stopped making jerseys for the NHL after 1984, I was still curious to find out if they kept making replicas or even retail authentics with the Sandow name after that. I did manage to find this, which looks like it might be a replica:
http://www.classicauctions.net/Default.aspx?tabid=263&auctionid=27&lotid=215
The collar is from the early 80's, but someone put the numbers on the sleeves, not the shoulders, which they didn't start doing until the late 80's. So perhaps this Sandow is really from the late 80's, as indicated, although I realize this is certainly not proof of that. Maybe the "Sunday" jersey reissue that HockeyMusic saw is also from this time period.