I think it depends upon where you're looking on the Italian Barber site.
On the page where they sell the razor, one of the options is "Razor head only (no handle)". It's $50, which is $5 less than the full razor. In that case I'd assume you get the top cap and bottom plate.
On another page they sell the "Game Changer .84-P bottom plate" for $30, and they specify it doesn't include the top cap.