I was thinking happy thoughts about the dimensions of the watch on my wrist. 40mm diameter, 10mm thick feels like a good substantial wodge of auto to me. It has a built up bezel and curved sapphire crystal - between them the equivalent of the nice domed acrylic crystals of yore - and a display back.
Then I looked up the thickness of the Seiko Cocktail Time: 13mm - and can't help but wonder where that extra 30% comes from (or why the watch buying public is unfussed by this trend)
Here are the thicknesses of three dressy Christopher Ward watches:
10.5mm - C65 Trident Classic (15ATM, SW200)
12.5mm - C9 Big Day Date (2836)
14.5mm - C9 (in house move with 5 Day PR)
Which suggests it's movements/complications, not WR, that accounts for the extra millimetres.