A friend of mine was harping on about how great his U2 was.
Whilst we were sitting in my garden he proudly claimed “It’s so much brighter than a U1” he said.
With that I asked him to take off his U2 and hand it to me….. I first removed his straps, placed it down, took off my U1, removed the straps, then picked up both watches and after placing them behind my back I changed them from hand to hand several times…
Finally I placed both watches down on the garden table and asked him “which watch is yours”?
After around 10 seconds he picked up first my watch, turned it over, placed it back down, picked up his watch, turned it over and proudly claimed “this is my watch”!
The only way he could tell was because his watch was more grubby on the back. 😜