Mice Find!
This is the later model of GE's micro-thermal oven. John has some of the earlier ones with the turntable in the oven. One of my neighbors in my last neighborhood who was in her 80s remodeled her kitchen and put one of these in. That is a nice looking range, similar in construction to my J390001. Those are 1980s GE dials. You don't see very many of these combination ranges. The oven has to be better insulated than the micro-thermal oven in my Amana.
The thing you have to check for in buying one of these used is the condition of the oven liner. If people used the oven as a microwave only without heating it, moisture condensed on the porcelain liner and caused it to rust.