Movement: Mechanical (Automatic) – RUNNING. Case Material: Gold-Capped / Gold-Top Shell over Stainless Steel Base. Case Back: Stainless Steel Screw-Back. Lug Style: Vintage “Beefy Lugs”. Dial Color: Smooth Silver / Light Champagne (Non-Waffle Finish). Band Brand: Speidel Pat. Band Style: Expansion Band with Vintage “Calendar Window” Module. Vintage Omega Seamaster Automatic – “Beefy Lugs” Project Watch. Featuring the highly sought-after, thick, and robust “beefy lug” case profile, this timepiece represents the golden era of Omega’s sports-utility production. It has been left exactly as discovered, retaining decades of authentic history and context. Listed strictly As-Is for Parts, Repair, or Full Mechanical and Cosmetic Restoration. For the professional watchmaker, advanced hobbyist, or dedicated vintage Omega collector, this piece represents an incredible canvas to build a high-value survivor. Mechanical Condition & Movement Breakdown. Please review the precise functional breakdown below. The Automatic Movement (RUNNING): The internal automatic movement remains active and responsive. When the watch case is gently moved or given a light shake to engage the internal weighted rotor, the center sweep second hand springs to life and begins running with a smooth, sweeping motion across the dial. The Winding Stem & Crown Core (Stem Intact): The outer gold decorative shell of the winding crown has come off. However, the winding stem itself is not broken or sheared flush. Upon close inspection of the crown tube area, the original stem is fully intact, and the inner steel core/sleeve of the original crown is still securely screwed onto the end of it. This is excellent news for restoration, as a watchmaker will simply need to unscrew the leftover inner core to mount a new crown. Consequently, the time-setting functionality, manual winding capacity, overall power reserve duration, and daily timekeeping accuracy remain completely untested. Condition, Flaw, & Patina Documentation. The Dial, Hands, and Indices. Patina & Aging: The dial face displays genuine, unmolested estate patina. There is visible spotting, micro-spotting, and uniform amber tarnish heavily concentrated along the absolute outer perimeter of the dial surface, right where it meets the inner bezel track. Handset Spotting: The original gold-toned dauphine hour and minute hands, along with the ultra-thin center sweep seconds hand, show distinct signs of vintage tarnish and oxidation. There is prominent spotting running down the spine and edges of both the hour and minute hands, and the seconds hand exhibits distinct spotting along its entire length. The Case, Lugs, and Crystal. It features a comprehensive network of fine hairline surface scratches across the central viewing area. More critically, there are prominent, deep stress cracks, fractures, and edge-splits heavily visible along the 6 o’clock and 9 o’clock profile view regions. “Beefy Lug” Case Construction: The case features a heavy gold-capped/gold-top shell over a solid stainless steel body. The gold layer is notably thick (typical of premium mid-century Seamasters) and has not been worn down to the base metal on the high edges. The lugs remain straight, thick, and physically unmarred by aggressive polishing wheels. Normal micro-scratches and minor surface pocket-pitting from years of wear are visible under magnification. Under-Case Grime & Verdigris: True to its untouched estate nature, the recesses of the case, the lug wells, and the area immediately surrounding the crown tube harbor a heavy amount of accumulated vintage dirt, skin residue, and green copper-carbonate oxidation (verdigris). This has been left completely uncleaned to prove the raw, unmanipulated state of the watch. Case Back: The watch features its original solid stainless steel screw-down case back. Centered on the back is the iconic, raised Omega Seahorse (Hippocampus) emblem, which remains crisp, sharp, and highly defined, showing minimal wear from clothing friction. The Vintage Speidel “Calendar” Expansion Band. This watch comes outfitted on a highly collectible, period-correct Speidel Twist-O-Flex expansion bracelet stamped with Patent Number 2,689,450 and marked “Stainless Steel” on the inner link plates. This is the highly unusual variant featuring a built-in mechanical metal framework designed to hold a miniature paper calendar insert. DEFECT – Non-Functioning Calendar Module: The calendar module at the top of the band features two small external adjustment wheels/knobs on the sides. This internal calendar mechanism is non-working. The side knobs do not properly turn or advance the internal display apparatus, and the mechanism appears frozen or disconnected due to age. DEFECT – Twisted Profile & Link Separation: The expansion band shows significant physical wear from decades of daily use. The overall profile of the bracelet has a distinct cosmetic twist/warp when resting. Furthermore, several individual inner expansion links have begun to lose their spring tension and are actively separating and gapping, revealing visible spaces between the metal segments. DEFECT – Damaged Endlink Shroud: The gold-toned decorative metal cover/shroud on the upper endlink (where the band connects to the watch lug) is completely split, torn, and peeled open. This structural split fully exposes the underlying inner mechanical tube and the vintage spring bar inside the lug well. The bracelet links and underside also show heavy dark tarnish, grime, and wear throughout. This watch is a project piece due to the incomplete crown setup and untested functions, despite the fact that the gear train still ticks and sweeps when handled.