Vintage Longines Mystery Dial, Swiss Watch, 10K White Gold-Filled Case, Cal. 23Z from 1950sAt first glance, the watch presents a clean and minimal composition, but its charm is in the subtle illusion at the center of the dial: the hour indicator doesnt appear to be attached to anything. Instead, it seems to float across the surface, gliding from marker to marker in a smooth, quiet arc. This is the hallmark of a mystery dial, a style that Longines executed with particular finesse. The design relies on a rotating disc hidden beneath the