This was a classic handyman special.
There where numerous issues with the sub panel.
What is classic is how they ran the service wires to the sub. I love the plug picture.
The home had a FPE panel and there where no additional breakers.
I added a picture of an appliance control center. This is the first one of these I have seen. Each outlet has a seperate reset. It killed the power but wasnt sure it still worked.
Being that this home needed a sparky I recommend him to look at this.
I also thought the A/C shut off box on top of the data plate was also a classic install.