I have a C35 rim sitting next to me. It weighs 440.4g. For a 35mm deep rim with al brake track, that is an excellent weight. Although it is a narrow rim by today's standards.

The relatively high mass of the C35 wheel set is because they use 2.0/1.8/2.0 spokes vs the 2.0/1.5/2.0 spokes of the C24 and of course the DA hub set which is no lightweight at 255R/132F.

Hope this helps.