Zvezda 3564 is the venerable Italeri kit from the 70s. If someone just gave me one, I wouldn't throw it out, but it's not something I would spend money on these days. The newer kit is 3620 as Rob said. Has some weird issues like the side skirts having Zimmerit texture while the hull doesn't, and some simplified details. It's a decent basic kit, and usually not too expensive.