Six Flags Perpetual Metal CalendarLook...made in Japan, not China!
Seriously, though, it has to be a pretty early vintage since it has a pic of the Mine Train on it, instead of the Screamin' Eagle. Also, the "Porpoise Pool!"
The Mine Train was prominent on many of the Souvenirs of the early days in the park, even after the Eagle came around they still showed the Mine Train a lot. I remember going to the park when the 2 biggest rides were the Eagle and Mine Train, wow how things have changed.