Omega Seamaster*** 145.024 Flat Jedi*** 1969
OMEGA Vintage Seamaster Chronograph ‘FLAT JEDI’ Ref. 145.024, Calibre 861, 1969
Serial # 3100XXXX
Circa: 1969

DESCRIPTION: Vintage Omega Seamaster Chronograph ‘Flat Jedi’ from 1969, all original

MOVEMENT: Caliber 861, hand-wound mechanical chronograph, 17 jewels

DIAL: Iconic grey matte ‘racing’ style dial with three registers, luminous baton markers; Orange hour, minutes and sub-seconds hands. White chronograph hands, central chronograph sweep seconds hand with pointed tip and flat back. Tachymeter on the periphery of the dial. Omega and Seamaster printed at the top and T SWISS MADE T printed at the bottom of the dial.

CASE: 42mm, Stainless Steel, original plexiglass, screw-down caseback

BRACELET: Pictured on a nylon NATO strap, comes with an original Omega stainless steel link bracelet


The Omega ‘Jedi’ was nicknamed by the late Chuck Maddox who was seen as the foremost expert on vintage Omegas. This name apparently came from the shape of these models, which often looked like Star Wars futuristic style designs.

The Caliber 861 (or Lemania 1873) found in this Seamaster is the same used in the Speedmaster Proffesional ‘Moon’ watches as of 1968-1969. "Omega launched the 27 CHRO C12 project jointly with Lemania in 1942, which led to the development of the caliber 321. The "27" in the project name referred to the movement diameter of 27mm. "CHRO" is an abbreviation for chronograph, while "C12" refers to a 12-hour timepiece. Omega was then using chronograph movements of three different diameters: 28.9mm, 33.3mm and 39mm. The company needed, however, a new 12-hour chronograph movement that was smaller and designed specifically for use in a wristwatch. The caliber 861 is a bit more accurate (21600A/h instead of the 18.000A/h of the Cal. 321). The big decision of Omega to use the Cal.861 in 1968 was probably the reducing in cost. The use of parts was reduced and the expensive column-wheel chronograph system was dropped.