I had until now (in Europe, for somewhat more than the last 2 decades) a couple of Panasonic microwave ovens.

Both of them match your description. They had some other buttons, which I have never used. Besides the 2 rotary knobs, I use 3 buttons: start, stop and a button for chaining multiple time intervals, each with a different power level.

I cook all the food that I eat in the microwave oven, from raw ingredients.