After lucking into a nice, patriotic relic card on my last trip through Walmart, I decided to give the hanger packs another go for a second time. The first time through, I beat the 1:48 (or 1:16) odds on a three pack purchase. This time, I hit on even longer odds.
Bruce Gamble. You can then cross-reference it with wikipedia to learn that Campbell didn't start wearing a mask until the 1970-71 season, when he was traded on Feb 1st. If the Leafs wore white at home that season, the photo was taken on Sat, Nov 14, 1970.
I may have over-analyzed that card a smidgen.