Not counting cog railways, like Mt. Washington about how many surviving engines are around divided into SG and NG. Other than riding a doubleheader at Cass back around 1982(2 shays of which I don't know the numbers), I have shot video of 1 shay(NG Yosemite Mt Sugar Pine), 1 Heisler at Mt, Rainier, which was doubleheading with Climax 10(Hillcrest).
So given my lack of knowledge on this stuff(All I think I know is that there are more Shays than Heislers, and there are only a handful of Climax types. How many of each are left, and how many operational?
Greg