That's a nice and well maintained looking saw. It's likely a 1940's saw and with a 1 1/2 or 2 hp motor, so it's possible to run it on 120 volts, but you would be better off using it on 240 volts. It's very likely a single phase because of their voltage statement. Those older jet lock fences aren't that bad, and will likely keep you happy until you can get a better fence. I don't see a miter gauge in the photos, so you should ask if it includes one, as they can be quite expensive if you need to buy one. If I didn't already own a Unisaw, I would be after this one. I think it looks like a great deal. The one in my high school shop in the 1950's looked exactly like this one and looked to be in the same condition back then.
For a home shop, you won't find a better deal, and the motor hp is likely all you will ever need if you wire it for 240 volts.
Charley