There were no PMGs in baseball in 1997. The Essential Credentials set was just catching its stride. Donruss Crusades wouldn't come out for another year. As mentioned in a previous post, the Mirror Golds were a shell of themselves in 1997.
In my opinion, this leaves one card to be king of the non-1/1 cards for 1997: Topps Finest Gold Embossed Refractors!
These weren't numbered in baseball, but it is estimated that there are anywhere from 35 to 70 of them (based on pop reports and what I've seen of them, I'd guess it's on the lower end of that range).
Being die-cut, getting this in a PSA 10 seems significant.
Pictures and videos don't do these justice. They are stunning in-hand.