Omega Constellation Chronometer ST (1970-1979)

Presented for auction by Second Vintage A sharp example of Omega's early 1970s electronic era, this Constellation pairs an exceptionally crisp stainless steel case with the brand's innovative tuning fork movement. The distinctive square geometry and integrated bracelet define its 1970s character, while the well-preserved brushed finishing highlights the watch's strong architecture. Brand: Omega Model: Constellation Reference Number: ST 193.766 / ST 194.766 Serial Number: 34195743 Movement: Omega Caliber 1250 tuning fork electronic chronometer Dial: Silver with vertical brushed texture and applied indices Case Size: 31 mm (excluding the crown) Case Material: Stainless steel Production Year: Circa 1972 Condition: Good vintage condition. Dial and Hands The original silver dial features a distinct vertical brushed texture, complemented by applied indices and an applied Omega logo. Scattered brown spotting and staining are visible across the dial surface, reflecting noticeable age-related character, though all printed text remains crisp and highly legible. The black stick hands present in clean condition, showing minimal signs of aging and providing excellent contrast against the textured dial. Case and Crystal The 31 mm stainless steel case is exceptionally sharp and well-preserved, displaying strong, crisp brushed finishing throughout. The case geometry retains sharp edges and well-defined transitions, particularly where the integrated brushed bezel area meets the polished chamfers. Wear is minimal, limited to light handling marks consistent with careful preservation. The signed crown features the Omega logo and displays defined knurling in good condition. The flat crystal remains clear, with no significant scratches or chips visible. Movement Powering the watch is the Omega Caliber 1250 tuning fork electronic movement. The caliber presents a clean appearance with no visible corrosion, and a battery is currently present. The movement bridges clearly display their factory engravings, reading OMEGA 1250, the serial number 34195743, UNADJUSTED, TWELVE 12 JEWELS, and LIC. BULOVA & PAT 9162. Strap The watch is fitted with its original signed bracelet in stainless steel. This integrated design features a brushed finish that perfectly matches the case, showing only light surface scratches consistent with careful use. The clasp is secured by a closure featuring a prominent raised Omega logo. The bracelet accommodates a maximum wrist size of up to 20cm. Condition Good vintage condition. The stainless steel case and integrated bracelet remain exceptionally sharp, retaining their crisp brushed finishing and strong geometric edges with minimal handling marks. The original silver dial shows noticeable age-related brown spotting across its surface, while the hands remain remarkably clean. The crystal is clear, and the tuning fork movement presents cleanly with no visible corrosion. Dimensions 31 mm (excluding the crown) Remarks This Constellation offers a highly compelling combination of 1970s design and horological innovation. The exceptionally sharp case geometry, the retention of its original integrated bracelet, and the presence of the Caliber 1250 tuning fork movement make it a fascinating acquisition for collectors of early electronic timepieces. History The Omega Constellation reference 193.766 is known to house the electronic tuning fork Caliber 1250, representing the brand's foray into high-precision electronic timekeeping during the early 1970s. The Caliber 1250 is a chronometer-rated movement built upon the reliable ESA 9162 architecture. This technology offered a fascinating bridge between traditional mechanical watchmaking and the quartz revolution, providing a smooth sweeping seconds hand and a distinct, audible hum that defines the electronic era of Swiss watchmaking. / Second Vintage SKU: OME-CCX-0003