
I'd become a little envious of owners of the older CW watches with nicely-decorated ETA 2824-2/Sellita SW200 movements, and was tempted when a black-dial Mk I was offered on this board. I fought my temptation, and the watch was sold very quickly. However, when almost immediately thereafter leebman offered his for sale, and one with the black date wheel to boot, I decided I couldn't look a gift horse in the mouth twice, and grabbed it.
So I now have a piece of CW's early history, with the dial displaying the "Swiss Movt" words, and a pretty movement that has perlage in addition to the blue screws, and a rotor that has interesting cut-outs besides the Geneva stripes.


Some other observations:
1. the CW box it came in was more compact than the one that came with my Mk II. I actually prefer the smaller box, because I find the newer ones take up too much space.
2. the deployant clasp was a single-foldover one, unlike the Mk II which has a double-foldover, butterfly clasp. It took me some time to figure out how to wear it as I didn't realise the curved inside of the clasp opened up! I prefer the older clasp because it's a slimmer design and less unwieldy.

When I wore the watch, my subconscious kept telling me the case was somehow different from the Mk II case. I believe the Mk I case is a hair (literally) slimmer than the Mk II case, although without vernier callipers I can't prove it.
I think that the dial is not as deeply-set into the case as the Mk II's (ie. the dial is closer to the crystal), and also that there is a subtle difference in the "bezels" of the 2 cases: the MK I bezel seems a bit flatter.
Assuming I'm not imagining all this, I have no idea if there were any differences between the cases of the earlier Swiss-Movt Mk I and the later Swiss-made pieces. I would be interested to hear from more knowledgeable members.