Oh dear another watch thread..........
Why on earth do you need a watch
Save your money.
Because post "B" , and also what China may do, in the UK we could have no electric, so no power for mobile devices to be recharged, no tv's and radios as the broadcasters will be cut off too, and for a while the watch on your wrist will be the few ways of telling the time. Wind up watches will then come back into fashion as batteries become another 'shortage'!!
. Now I joke of course, but do you know today there was a big national campaign started to encourage us British people to have an emergency "grab bag" handy near the front door with torches, first aid kit, water, etc!!!
We didn't even have all that rubbish during the Cold War, so what the hell do the authorities expect to happen?!