Presented for auction by Second Vintage This timepiece represents a fascinating and highly transitional era in horological history, bridging the gap between traditional mechanical watchmaking and the quartz revolution. During the early 1970s, tuning fork technology was the pinnacle of precision, and Omega embraced this innovation to power their most prestigious lines. Housed within a robust tonneau case, this electro-mechanical chronometer offers a unique wearing experience characterized by the signature hum and sweeping seconds hand of a tuning fork caliber, appealing deeply to collectors of vintage technological milestones. Brand: Omega Model: Constellation Electronic Chronometer Reference Number: 198.741 Serial Number: 34622673 Movement: Tuning fork caliber 1250, 12 jewels Dial: Vertically brushed silver dial with applied indices, showing prominent oxidation around the extreme outer perimeter Case Size: 37 mm (excluding the crown) Case Material: Stainless steel Production Year: 1970s Condition: Good vintage condition with a sharp case and notable perimeter dial patina Dial and Hands The dial features a striking vertical brushed silver finish that plays beautifully with the light. It is adorned with an applied Omega logo, the applied Constellation star, and crisp black sans-serif typography denoting its electronic chronometer status. The hour markers are applied faceted steel batons featuring stark black central inserts, which perfectly match the black baton handset and sweeping seconds hand. A date aperture is positioned at three o'clock, framed by a stepped metallic border. Upon close inspection, the central surface of the dial remains exceptionally clean and legible. However, the extreme outer edge of the dial exhibits a distinct, continuous ring of orange and brown oxidation where it meets the inner case rim, providing a very specific, age-consistent framing to the watch face. Case and Crystal The tonneau-shaped stainless steel case demonstrates excellent vintage geometry. The upper surfaces feature heavy, factory-style vertical brushing that contrasts sharply with the polished case flanks. The transitions between these brushed and polished surfaces remain crisp, indicating careful preservation over the decades. The winding crown is properly signed with the Omega logo. The screw-down caseback features a circular brushed center and polished outer edge, displaying minor surface scratches and historical tool marks consistent with honest wear and battery changes. The crystal presents clearly above the dial, offering an unobstructed view of the hands and indices. Movement Powering this Constellation is the Omega caliber 1250 tuning fork movement, a marvel of 1970s electro-mechanical engineering. The movement plates are finished in a rich copper tone with fine ribbed detailing. A close inspection of the caliber reveals crisp engravings, including the Omega branding, the caliber number 1250, the serial number 34622673, and markings indicating twelve jewels and unadjusted status. The iconic tuning fork coils are fully visible, alongside the stamp noting the technology is licensed by Bulova. The movement is currently fitted with a Maxell LR1130 battery. Strap The watch is fitted with a black textured leather strap featuring a stylized reptilian pattern. The strap is detailed with contrasting white perimeter stitching, which visually complements the black hands and indices of the dial, securing comfortably to the wrist. Condition This timepiece is in good vintage condition. The stainless steel case is a highlight, retaining sharp lines, distinct chamfers, and strong original finishing techniques with only normal handling marks. The dial shows a clear duality in its condition, possessing a highly preserved central area bordered by visible perimeter oxidation and rust-toned patina along the absolute edge. The movement presents very cleanly, retaining its bright copper-toned plating and clear factory engravings. Dimensions The case measures 37 mm in diameter excluding the signed crown. Remarks Combining the prestigious Constellation lineage with an incredibly important technological movement, this Omega offers a distinct wearing experience. The sweeping seconds hand and the faint, resonant hum of the tuning fork caliber make this a truly engaging piece of horological history for the dedicated collector. History The early 1970s marked a period of rapid technological innovation in the Swiss watch industry. Before quartz movements achieved total market dominance, tuning fork technology represented the absolute cutting edge of accuracy. Omega utilized Bulova's patented f300Hz technology to create a line of highly precise electronic watches. To maintain the elite status of the Constellation family, Omega ensured these advanced electronic movements were certified as chronometers, blending their long-standing reputation for luxury with the most advanced timekeeping technology available at the time. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and very securely packaged, and shipped with tracking and insurance for your peace of mind. We ship via fast express service, with typical delivery in 1–4 business days (destination dependent). Note that with vintage watches, minor signs of wear, aging, or imperfections may be present and are considered normal for watches of this age. Please review all photos carefully before bidding. We strive to photograph each watch from multiple angles for the most accurate representation. The photos form an important part of the description. If there are any concerns of functionality or defects after delivery, make sure to contact us within 3 days of receiving the watch so we can assist you. As with all vintage watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: OME-OCC-0051