Omega Seamaster Calendar 2627-3SC (1950-1959)

Now available at auction from Second Vintage Early Seamaster models with the date at 6 o'clock and bumper movements are sought-after by collectors, and this c. 1951 example offers exactly that distinctive configuration. Driven by the caliber 353, this timepiece presents an honest preservation of Omega's post-war design language, highlighted by its applied faceted indices and signed clover-style crown. Brand: Omega Model: Seamaster Calendar Reference Number: 2627-3SC Serial Number: 12918987 Movement: Caliber 353, bumper automatic, 17 jewels Dial: Silver-tone brushed finish with spotting and framed date at 6 o'clock Case Size: 34mm (excluding the crown) Case Material: Stainless steel Production Year: c. 1951 Condition: Good vintage condition. Timegrapher: +20+25s/day, running strong and steady. Dial and Hands The silver-tone dial features a brushed finish and is evenly aged with noticeable spotting scattered across the surface, particularly near the center and edges. It displays applied faceted dart indices along with a distinctive shield marker at 12 o'clock. A framed date window is prominently positioned at 6 o'clock, and all printed text remains legible. The dauphine style hands show visible oxidation and spotting consistent with the aging of the dial. No luminous material is present on the dial or hands. Case and Crystal The stainless steel case features a polished finish and presents honest vintage wear with preserved geometry. The surfaces show moderate scratches and scuffs consistent with age and use, while the lugs retain good thickness and shape. A smooth polished bezel frames the dial, displaying light scratches matching the wear of the case. The watch retains its clearly signed clover-style crown, which shows light wear. The inside of the caseback is stamped ACIER STAYBRITE. A clear, domed acrylic crystal protects the dial and exhibits no major scratches or cracks. Movement Inside is the Omega caliber 353 bumper automatic movement, featuring striking copper-colored plating. The movement is engraved with OMEGA WATCH Co, SWISS, SEVENTEEN 17 JEWELS, the serial number 12918987, 353, and OXG. The surfaces show some light scratches and signs of previous handling, particularly on the rotor, but no severe corrosion is visible. Evaluated on the timegrapher at +20+25s/day. Performing well within expected vintage tolerances; running strong and steady. Strap The watch is paired with a black leather strap featuring an alligator or crocodile pattern with contrasting white stitching. The strap appears to be in near-new condition. Condition Good vintage condition. The case retains its shape well, exhibiting moderate scratches and scuffs expected from an honest vintage timepiece. The dial and hands are evenly aged with visible spotting and oxidation. The domed acrylic crystal remains excellent and clear. The bumper automatic movement is running well, with timegrapher results confirming strong and steady performance. Dimensions The case measures 34mm in diameter (excluding the crown). Remarks This Seamaster Calendar stands out due to its unusual 6 o'clock date placement and early bumper automatic movement. The presence of the signed clover crown and the distinct shield marker at 12 o'clock make it a highly attractive example for enthusiasts of mid-century Omega design. History Introduced in the early 1950s, the Omega Seamaster Calendar marked an important evolution in the brand's lineup by incorporating a date function. A distinctive design choice of this era was the placement of the date window at 6 o'clock, which contrasted with competitors who typically placed it at 3 o'clock. This model is powered by the Caliber 353, a 17-jewel bumper automatic movement operating at 19,800 beats per hour with a 42-hour power reserve. These early bumper movements and unique dial layouts remain highly sought-after by collectors today. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind. We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination. Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age. We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description. The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use. If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you. As with all used watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: OME-ASX-0028