Re: But it can't beat the world's greatest watch: Casio F-91W
My last F-91W developed a faulty button, and then the strap broke. Even when it worked I found that I missed a feature found on slightly pricier Casios: a higher pitched beep that indicates that the mode button has returned the watch to telling the time. Still, they cost 7 quid, a bargain. I also like the 10 quid analogue Casios - they look like Dieter Ram's Braun watches, or the Seiko in a famous 80s photo of Steve Jobs.
Currently I'm wearing a Casio AW-81 - analogue hands with digital display for world time, stop watch etc. Really quite useful. And expendable, unlike my 1968 inherited Omega.
What the Braun, Seiko and Omega have in common is a compact (38mm ish) size and a very clear, easy to read face. I'm astounded by how many watches these days fail to meet these two basic criteria.