The First Micro Wave?

i wanted to ask you this because tho, the micro wave is was a staple in so many houses for for years. People ruined food for a full decade when they started getting micra wa s land thos buttons on them that would say muffin or anything. When i was a young kid, my dad put a muffin in there and hit muffin, not realizing that that meant to cook a muffin,. right? Ok? So in what year was the first micra wave oven sold? What year? Mory moka, was the first micro ev ovn sold? 19 72. Mory, 19 79. 19 55. How much was it when it was, when