[swarmee]

I got a 9 on a vintage card, along with a bunch of 8s and an 8.5 (highest graded for the entire PSA graded 1909 T51 Murad College Series). The 9 was on a 1930 British wrestling card of Primo Carnera that had a photograph front and paper backing, from a set that I think was sold as complete in a box. So many of those (like the 1915 Cracker Jacks) stayed in great condition because many retained their original packaging for 100 years. Some of those cards that came in glassine envelopes could also get high grades since they weren't really subjected to the elements/corner dings.
The T51s were from a complete set sold by Kit Young, so they were probably from a collector who spent years compiling the most attractive set he could and upgraded it regularly over time. I am about to sell that Master set of 225 cards; will be interesting to see how it goes. Now that COMC has their eBay auctions set up, I may just consign the entire set and have a set break and let the chips fall where they may.