Wow - yellow! Very rare, only available in the first models of the '06 line (906,806,606,406 - 206,106 in white only) and then turquoise and yellow were gone by '68-69 when the avocado and gold colors came out. (I find no mention of "Castillian" yellow anywhere in Maytag doctrine though??)
Don has a turquoise set of 806's - just beautiful and so strange to see them on a set that "new" as most mfrs. had dropped the pastels around this time.