Thanks Nong Khrap, I thought of that as well, but for the early 70's I would think they got a franchise. But back then the terms of the contract were not so strict. They were either allowed or decided on their own to sell more. That chicken had to be expensive for back then, so a bit more to the menu to get people in the shop. Just a guess for sure. I know Popeyes came here about 2000 and did not make it, and folded within a year or so.