Lawrence:
Then I'm going to say 1966. I don't think it's later, because if memory serves, '66 was the last year for the handle escutcheons - that trim behind the oven door handles.
P.S., Les - the description might be a little confusing. The way it's written, it makes it sound like this is double self-cleaning ovens. It's not - on these ranges, the big oven was P*7 self-cleaning, but the small oven was conventional-clean.