My calculations *push up glasses on my nose* confirm it as a Mach 2 CD 2
470g for the rim, if you measure it as 19mm wide. If it is 20 it is likely to be an araya or rigida.
And for those that are worried about these wheels, I have mavic 24h hubs with GL330 rear and Cx18 front.
similar to this wheelsmith set but almost 100g lighter for the set (with skewers).