I'm speaking of watches in the 1970's or earlier. A lot of times when I see a watch up close in an older movie, it appears to have a dial that "bubbles" out in front. But I don't really see any new watches like this. I see two possible explanations.
(1) Watches used to have more curved crystals, which gave the illusion of a curved dial.
(2) There used to be more mechanical watches which would have required more room for the bigger movement, as opposed to quartz watches of recent decades. It's hard to tell these days because, along with the renewed popularity of mechanical watches, there is a trend towards larger watches. The larger watches these days would have ample room for a larger movement, thus eliminating the need for the "bubble" case.
I would appreciate any info. Thanks.