A Guide to Modern Whitehorse, Yukon
At this point (December 2016), I have no information about the Cheechako Grill. The rearing white horse is very similar to the one used by the historic Whitehorse Inn, so I expect that it was located in the hotel. From the prices, I think that it's from the 1960s.
The "Breakfast Specials" page below was a separate page, printed on the same type of very heavy paper.