The regular Dagor looks like it'll fit a Copal 1 from the factory, so if the cells are the same size it would follow that this could also be fitted to a Copal 1. However, if the actual threads are completely different, as it seems they are, it may not.

8.25dag.jpg

SK Grimes image attached. This is a Gold Dot, though, which may mount to something different again. :/