I have a double shelved Bear Polar that's pretty old.I saw a catalogue for 1961(I think) and it wasn't listed so I'm assuming it's older.
If your Alaskan is maple and has light greay glass,it was made in 1958.If it is walnut and has red & black glass,it was made from 1959-1961.This is for the 62" semi-recurves
The full working Alaskan recurves were made from 1966-1970,year made is depending on the length