If the the solder joints aren't boogered with it can't be an early 60's..How could it have pots dated to 66. Looking at some catalog pages(I know they could be all over the place) and what the pics show and color options i'd think its a 69 with a little mix of different yr parts maybe. 69 catalog,Walnut color,2 screw slide type selector switch(Like Yours),But witch hat knobs. 66 Catalog, 2 colors offered (PB CR) "regular" looking/style 3 way switch and black reflector knobs. With narrow MM headstock.