I think you have it reversed: Stop2Go is to tickle tourists. There is no functional reason to have a watch work that way. By design, in a Stop2Go watch, the second hand runs 1 percent faster than it should, in order to accommodate the kludgy 1940s clock synchronization system used by Swiss railways. I doubt that even Swiss railways use the original system anymore. It's like the dearly departed Paris Pneumatique postal system: fondly remembered, but a part of the past.