I got a saw

I know the craftsman miter box doesn't actually go with the saw, but the saw is a Diamond Edge model no.DE135 I it has a flippable blade and it functions. It's fairly sharp despite the rust, which is mostly surface. It is acid etched and I can barely read it, but it says, "This Saw is made of Spring(?) Saw Steel of the Finest Quality. It is Fully Warranted and Represents the Home (?) of Perfection in Saw Making." I have no idea why it'd have this etched, but I paid $15 for both the saw and miter box. Is there something I should know about the saw? Is it a high dollar saw...or what?