Nice score! Kronas are incredible shavers - just check the review section to see how much love they rightfully get here. Mine's on heavy rotation right now. Enjoy!
That is an excellent steal that you got on the bay . As others have mentioned the Schick is a mild razor but when paired with a sharper blade can yield excellent results. The Schick Krona has a even lower head profile than later Gillette TTO models.
Kronas are so under appreciated I'd keep that set as is and get another shaver grade Krona for small money....one day they are going to be "discovered" and your cased set will bring premium $$$$$$$$$$$
I'd recommend caution, I think Krona's are addictive. Now that you've got one, you'll probably want another etc. And besides being good shavers, there are some small differences which you'll learn. Enjoy, and ya done good!
I really like mine. Shaves great! Unfortunately the case and blade cases to mine are long gone, but the razor shaves great! Just watch how you grab it each morning, I accidently cut a divot out of my finger grabbing it yesterday (with a Feather blade -- those blades must be extra sharp!). That last line probably applies to any DE, though.