I didn't weight mine ( Pam 198 ), which is a 45 mm Rad in platinum, but I can tell you that it is one of the heaviest watch I know.
Much more than a 5960P, and it seems, if I remember well, that it is a bit more than a Double Split.
BUT, on another side, it is a cool watch to wear, and the density of platinum is something very pleasant.
Best,
Nicolas