Seiko - Presmatic Hi-Beat 深界 – Shinkai – Deep Realm - No reserve price - 5146-5001 - Men - 1970

Available now on auction by Second Vintage The Seiko Presmatic is a sophisticated and technically impressive highlight from Seiko's golden era of mechanical watchmaking. Combining the advanced Hi-Beat 5146 movement with a distinctive "TV-screen" case design, this timepiece perfectly encapsulates the transition into the bold aesthetics of the 1970s. It features the unique "press-matic" quick-set date function, a clever mechanism that sets this model apart from its contemporaries. This specific example boasts a remarkably clean dial and a sharp case, making it a compelling choice for collectors of high-grade Japanese horology. Brand: Seiko Model: Presmatic Hi-Beat Reference Number: 5146-5001 Serial Number: 032191 Movement: Automatic Cal. 5146A Dial: Silver Sunburst Case Size: 37 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1970 Condition: Good vintage condition. The watch presents honestly with visible wear to the case consistent with age, while the dial remains in remarkably clean condition, offering a strong vintage presence on the wrist. Testing indicates a daily rate of approximately -5 to -9 seconds, which indicates a healthy movement. Dial and Hands The silver sunburst dial is preserved in stunning condition, radiating a clean and bright metallic sheen. It features applied silver baton indices with black inlays that provide excellent contrast. The handset matches the indices perfectly, and the seconds hand features a distinctive yellow tip, a signature design element of this reference. The day and date window is elegantly framed at the three o'clock position. The dial text remains crisp and black, featuring the applied Seiko logo and the Suwa Seikosha factory symbol. Case and Crystal The stainless steel case features a distinctive cushion or "TV-screen" shape that sits prominently on the wrist. It is in honest vintage condition, showing visible surface scratches and signs of wear on the polished bezel and brushed sides, consistent with a watch of this age that has been enjoyed. The edges retain their definition. The unique hexagonal crown is recessed flush into the case, a design feature specific to the Presmatic line to prevent accidental date changes. The acrylic crystal is clear and presents well. Movement Powering this timepiece is the high-grade Seiko caliber 5146A automatic movement. This "Hi-Beat" movement operates at 28,800 vibrations per hour, a specification reserved for Seiko's higher-tier watches to ensure greater accuracy. It features 27 jewels and is aesthetically clean. Timegrapher testing shows the watch is running between -5 and -9 seconds per day with strong amplitude, offering reliable vintage performance. Strap The watch is fitted with a new black leather strap featuring white contrast stitching. This strap choice complements the monochromatic tones of the dial and case, giving the watch a sporty yet elegant appearance suitable for daily wear. Condition This piece is in good vintage condition. While the case bears the marks of history with evident surface scratches, the structure remains solid and attractive. The dial is the highlight, free from significant aging, spotting, or damage, which is rare for this reference. The movement performs reliably with healthy amplitude. Dimensions The case measures 37 mm in width excluding the crown, but due to the square cushion shape, it wears larger than a traditional round watch of the same diameter, offering a substantial presence on the wrist. Remarks The Seiko Presmatic, also known as the Seikomatic-P in earlier iterations, represents a high point in Seiko's mass-production capabilities before the Quartz crisis fully took hold. The 5146 movement is often compared favorably to King Seiko and Grand Seiko calibers of the time due to its robust construction and Hi-Beat rate. The "Presmatic" name is derived from the innovative hexagonal crown button; pressing it inwards instantly advances the date, a feature that is both practical and mechanically satisfying. History Produced in March 1970, this watch hails from the Suwa Seikosha factory during a pivotal year for Seiko. The Presmatic line was designed for the business professional who demanded precision and convenience. It bridged the gap between the standard Seikomatic line and the high-end King Seiko models. The 5100 series of movements are celebrated by movement nerds today for their unique architecture and the complexity of the push-button date mechanism, marking a unique chapter in vintage Seiko history. / Second Vintage SKU: SEI-SPH-0002