Old Pprune thread on a related subject.
of the much loved old RAF issue watch.
But repeating what we've all said, a £20 job from Argos will work fine - but this is a very nice reliable watch fine for flying, and looks okay with a suit as well. Strangely a fraction of the price of most of the watches being sold as "pilot watches" - which by and large no serious pilot would be seen dead wearing.
Incidentally one thing I would not be without is the "Animal" velcro wrist-strap on my watch (about the fifth I think, they usually last about 3 years), which allows me to take the watch off and wrap it around a convenient bit of aircraft structure in front of me - usually the yoke.
G