I've mentioned the latest Bill Bryson book in the context of disputing Michael Pollan. I happened on this British site (ah, the wonders of the Internet), which includes some 50's images, plus (under the label "Image of 1950's Bounty", the picture of the food for a year for a family of 4 I referred to.
I have to say those chickens look scrawny. Note they're whole chickens. Rather than outsourcing the cutup process to immigrants at Tysons plants, mother does it herself as part of her hours at the stove and sink.