I pulled up a picture of the power supply off the net. Standard old AT power supply. Nothing special. Back in the AT power supply days most were 150 watts, if you had a lot of hard drives you might have had a 300 watt. I've swapped a lot of small power supplies for bigger. Generally the concern is that the power supply is big enough, never been concerned with it being too big. I'm calling bunk on the surge risk, it's not how regulated power supplies work, they provide what is drawn to the limit of their capacity, beyond that they over heat and release their smoke.
I don't recall who used the globe logo but it's a generic power supply.