The watch is gaffed so any time can be programmed in it to stop exactly on the minute. All this is done while causally demonstrating how to read the time. When the stem is discreetly pushed in, the watch silently begins to run "Back in Time" until it stops at the spectator's time.
"Back in Time"
Stem Release & Stop
Gerlitz Magic Films
Back To The Gerlitz Back in Time Watch