Available now on auction by Second Vintage This elegant Longines reference 3609 4 represents the pinnacle of mid-1970s minimalist design and ultra-thin watchmaking. With its clean lines and slender profile, this timepiece serves as a sophisticated dress watch that slides effortlessly under a shirt cuff. The watch is powered by the high-grade Caliber L847.4, a movement celebrated by collectors for its remarkably thin architecture and reliability. This is a splendid opportunity to acquire a classic Swiss dress watch that combines horological history with timeless style. Brand: Longines Model: Ultra-Slim Reference Number: 3609 4 Serial Number: 53444605 Movement: Manual Wind Caliber L847.4 Dial: Silver with black baton indices Case Size: 33 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1976 Condition: Good vintage condition. The watch presents an honest vintage aesthetic with visible aging on the dial while retaining a sharp, well-preserved case structure. Dial and Hands The watch features a classic silver dial that embraces a minimalist aesthetic with slender painted black baton indices and matching stick hands. The dial shows clear signs of age and patina, most notably with spotting and marks along the outer periphery between the 7 and 9 o'clock positions, as well as minor marks near the 4 o'clock marker. This aging gives the watch a distinct, honest vintage character. The Longines logo and winged hourglass emblem remain crisp and legible at the 12 o'clock position. Case and Crystal The stainless steel case is in well-preserved condition, measuring a classic 33mm in diameter. The case features straight, refined lugs and a slim bezel that maximizes the dial presence. The surfaces show light wear consistent with careful usage over the decades, retaining good definition on the edges. The watch retains its original Longines signed winding crown, which is a desirable detail for collectors. The crystal is clear with no major distractions. Movement Inside beats the renowned Longines Caliber L847.4, a 17-jewel manual wind movement designed specifically for ultra-thin dress watches. The movement appears visually clean and well-maintained. Timegrapher testing indicates a daily rate of approximately -35 to -40 seconds, which indicates a healthy movement running within acceptable vintage parameters for a watch of this era. Strap The watch is fitted with a classic black leather strap featuring an alligator grain pattern. The strap is in good condition, soft and pliable, and complements the formal nature of the steel case perfectly. It is finished with a polished silver-tone pin buckle. Condition This timepiece is in good vintage condition. While the dial exhibits noticeable patina and spotting consistent with its age, the case remains sharp and attractive. The movement is running reliably. It is a piece that wears its history openly, offering a genuine vintage experience for the enthusiast who appreciates original character. Dimensions The case measures 33mm in diameter excluding the crown, which was a standard and elegant size for men's dress watches during the 1970s. The lug-to-lug profile and thin case height ensure a comfortable fit on a variety of wrist sizes. Remarks This Longines reference 3609 4 is a quintessential dress watch from the 1970s. Its primary appeal lies in the prestigious Caliber L847.4 movement and the enduring elegance of its design. It is an excellent choice for a collector looking for a refined Swiss timepiece that can be worn for formal occasions or as a sophisticated daily wearer. History Longines has a storied history dating back to 1832 in Saint-Imier, Switzerland. By the 1970s, when this watch was produced, Longines had established itself as a leader in precision timekeeping and elegant design. The era marked a focus on slim, efficient movements, with the L847 caliber being a prime example of their engineering prowess during a transitional period in the Swiss watch industry. This specific serial number places the production circa 1976. 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). 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. As with all vintage watches, water resistance is not guaranteed. The watch will be delivered in fully functional, working condition. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: LON-LXX-0019