Manipulate the big 2nd hand and cooperate While using the 9 o'clock dial to correctly rely the seconds Maybe most important with respect to horological history writ huge was the debut of the “Omega” caliber in 1894, a 19-ligne, crown-set movement whose interchangeable areas have been intended for straightforward support. https://www.watchesworld.com/a-history-of-watch-reference-numbers/