Seiko Grand Seiko Hi-Beat 4520-7010 (1970)

Now available at auction from Second Vintage This highly sought-after Grand Seiko 45GS pairs a beautifully preserved C-line cushion case with a celebrated high-beat manual-wind caliber. Finding these collector favourite pieces with their gold caseback medallions intact and their distinct case geometry so sharply retained has become increasingly difficult, making this a superb opportunity for enthusiasts of vintage Japanese watchmaking. Brand: Seiko Model: Grand Seiko Reference Number: 4520-7010 Serial Number: 060301 Movement: Manual-winding caliber 4520A, 25 jewels, 36,000 bph Dial: Silver with applied indices Case Size: 36 mm (excluding the crown) Case Material: Stainless steel Production Year: 1970 Condition: Excellent vintage condition. Timegrapher: +20+25s/day, running strong and steady. Dial and Hands The pristine and highly legible silver dial presents a clean surface with minimal signs of aging. The "SEIKO GS HI-BEAT" printing remains crisp, complemented by bright applied indices. Under macro inspection, slight discoloration is visible at the very edge of the dial between 4 and 8 o'clock. The hands exhibit excellent preservation matching the dial, featuring a clean silver finish with intact black central stripes and sharp edges showing no visible oxidation or corrosion. Case and Crystal The stainless steel cushion-shaped case features elegant C-line curves and retains a crisp, highly original appearance. The sharp edges and well-preserved geometry display distinct transitions between the brushed and polished surfaces, with only light surface scratches consistent with careful wear. A smooth polished bezel frames the dial, showing light hairline scratches. The clearly signed GS crown features well-defined knurling. Turning the watch over reveals an intact and well-preserved gold GS medallion on the caseback. The domed acrylic crystal is clear, with no major scratches, chips, or crazing visible. Movement Inside is the caliber 4520A, a 25-jewel manual-winding movement that operates at a high-beat frequency of 36,000 vibrations per hour. The visible going train, plates, and bridges are remarkably clean, showing no visible corrosion, oxidation, or damage. The gold-filled engravings, including "SEIKO", "4520A", "104572", and "25 JEWELS", are crisp and highly legible. The timegrapher records +20+25s/day. Performing well within expected vintage tolerances; running strong and steady. Strap The watch is fitted with a black leather strap featuring white contrast stitching. It shows light wear and provides a casual, comfortable pairing for the timepiece. Condition Excellent vintage condition. The case retains sharp lines and distinct finishing transitions, displaying only light surface scratches alongside a remarkably intact gold caseback medallion. The dial is exceptionally clean, with only slight edge discoloration visible between 4 and 8 o'clock under magnification. The hands and domed crystal remain in wonderful shape. The movement is clean and, supported by the timegrapher data, is running strong and steady. Dimensions The case measures 36 mm (excluding the crown). Remarks This Grand Seiko 45GS is a collector favourite, defined by its sharp C-line case geometry and intact gold medallion. The combination of a clean, minimalist no-date dial and the high-beat 36,000 bph movement makes this a highly desirable vintage timepiece. History Introduced in 1968, the manual-winding caliber 4520 represents a significant technical achievement in Seiko's high-beat manufacturing. The reference 4520-7010 utilizes a cushion-shaped case with distinct C-line curves, offering a visually softer yet equally refined alternative to the sharper 8000 series cases. This specific 1970 reference highlights the brand's dedication to precision engineering and elegant design during a highly respected era of watchmaking. 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: SEI-KHX-0005