1957’s Vintage Seiko Crown 15002CW Silver Case Mat Sunburst Pearl White Dial 21 Jewels EGP Gold Case Leather Band Manual Wind Men's Wristwatch Good condition KM226 This elegant Seiko Crown 15002CW represents one of the earliest generations of the famous Crown family, produced during the late 1950s. The Seiko Crown line was introduced in 1959 and became one of Seiko’s core mid-range manual-wind dress watches during the early 1960s. The Crown series occupies an important place in Seiko's history because it served as the direct predecessor to the Cronos, Lord Marvel, and ultimately the first Grand Seiko. Powered by the reliable 21-jewel Caliber 560, this watch demonstrates the excellent craftsmanship of Seikosha during Japan's rapid post-war watchmaking development. The movement is known among collectors for its durability, smooth winding feels, and stable long-term accuracy after proper servicing. The watch features an elegant matte pearl white sunburst dial, applied gold baton hour markers, dauphine hands, center seconds, and a slim gold-filled case that perfectly captures the understated style of the late 1950s. The EGP (Electro Gold Plated) 20 Microns Gold Filled case provides significantly thicker gold plating than ordinary gold-plated watches, giving both durability and a luxurious appearance. Crown15002CW was produced predominantly early- to mid-1960s by Suwa Seikosha 諏訪精工舎. This is a watch that embodies the charm of vintage timepieces. This Seiko Crown model is a hand-wound antique wristwatch developed based on a design philosophy similar to that of the high-end "King Seiko". Its movement accuracy was excellent for its time, and its slim case made it popular as a business or dress watch. The 560 movement engraved in the caliver is used for Crown series as part of Seiko’s “next-generation” hand-wound family — featuring a larger balance wheel and Diashock anti-shock system for sturdier, predictable performance. Its distinctive features include a 21-jewel movement, an 18,000 bph （vibrations per hour） movement, and a practical accuracy of approximately ±60seconds per day, ensuring highly stable accuracy at the time. Although it is not as high-end as the King Seiko or Grand Seiko, it is still highly regarded by vintage collectors as a practical mid-priced model with a design equivalent to the high-end " King Seiko or Grand Seiko " models Features: ■Brand Design: SEIKO Crown ■Model Number: Crown 15002CW ■Product Number:710824 Manufactured January 1957: Seiko serial numbers are six digits long, with the first two digits indicating the year and month of manufacture. The first number （7） indicates the seventh year of the 1950s, meaning the watch was manufactured in 1957. The next letter （1） is the month code. For Seiko,1-9 represents January through September, O = October, N = November, and D = December. → "N" is November. Therefore, this watch was manufactured in January 1957. ■Technical features of Seiko Caliber 560 — Technical Specifications • Type: Manual-winding mechanical movement (hand-wound). Used in: Seiko Crown series (late 1950s–1960s). • Development: Built at Seiko’s Suwa factory; advanced for its era with larger component sizes to improve stability and serviceability. • Number of Jewels: 21-jewels • Beat Rate (Frequency):18,000 vibrations per hour (vph) (~2.5 Hz) — traditional moderate rate for vintage manual movements. • Diameter:27.6 mm (movement plate diameter) • Functions: Hours, minutes, seconds (no date). • Hacking: No hacking (seconds do not stop when setting time). • Power Reserve:40–48 hours typical for similar designs (not always published for 560 specifically, but consistent with its gearing and spring size). (Typical range for similar vintage calibers.) • Regulation:Regulator lever for timing adjustment. (Standard for 1960s manual movements) • Shock Protection: Diashock system to protect balance pivots. (Common in Seiko hand-wound calibers of this era) • Hairspring/Balance: Traditional flat hairspring with balance size suited to 18 kHz rate. (Consistent with vintage specs.) ■Why These Specs Matter: • Beat Rate (18,000 vph): This moderate beat was common in 1950s-60s manual watches. Lower beat rates generally mean less wear on parts, simpler regulation, and strong torque from the mainspring — good for reliability, but slightly less smooth seconds sweep compared to modern 28,800 vph movements. • Jewels & Lubrication:19-jewel versions are slightly simpler; 21-jewel versions add rubies to reduce friction on more moving parts. More jewels usually help with longevity and precision, especially in a straightforward movement without extra features. • Size: The 27.6 mm diameter makes it slightly larger than some of Seiko’s smaller hand-winds (e.g., older Marvel calibers ~25-26 mm) This gave more room for larger gears and springs, boosting accuracy and power reserve. • Design & Historical Context: The Cal. 560 was based on Seiko’s earlier Marvel series and acted as a foundation for future higher-grade movements (including the hand-wound basis for early King/Grand Seiko calibers like Cal. 3180).It was engineered to be robust, service-friendly, and accurate for its time, fitting the mid-range dress-watch market before automatic movements became dominant. ■Materials: • Case: EGP 20 Microns Gold Filled • Case Back: Stainless steel Back inside shows inscription of EGP Gold Filled Case Product No:710824 • Dial: Sunburnt Champagne Pearl White color face with classic indexes and Dauphine 3 hands display combined for both legibility and elegance. • Case Size:35mmexcluding crown X 43mm including case lug Thickness: 10mm • Weight:39.5gms • Band: Leather Brand 22cm wrist circumference length with 5.5cm less adjustable in 9 holes • Crystal: Domed Acrylic 【Notes】This watch is not water-resistant. Please avoid wearing it in the rain or on hot, humid days. 【Winding Tips】 To wind the mainspring, turn the crown slowly and gently in clockwise and counterclockwise both directions back and forth until you feel stiff strong resistance, and you could hardly wind further. Strong-Over-winding may damage the mainspring. A full wind usually generates enough power for the watch to last for 24 hours. To pull out the crown, insert your fingernail between the case and the crown and gently lever it outward. The second hand does not stop when setting the time. ■Condition: Overall: The watch is in good pre-owned vintage condition and is currently in working order. There are light scratches and signs of wear on the case consistent with normal use over time. Case: Silver St-Steel Case shows very minor typical surface scratches, micro-scuffs, and signs of wear due to its vintage age and regular use. Dial & Crystal: The dial remains in excellent, clean condition, well preserved with clear printing, applied indices, and an attractive texture that has aged gracefully. The crystal shows some minor micro-wear upon close inspection. Tested by manual winding three times each time during July 2026, the power reserve was 18, 20 and 22 hours respectively.so power reserve has slightly reduced due to age-related wear and metal fatigue on the mainspring. But despite over 60 years usage. the watch is in good condition overall and still does work precisely, but very careful handling, when winding and setting time, is required due to a real vintage watch. As the movement and lubrication are in good condition, it is suitable for daily wear if wounded and worn regularly. It needs to be wounded at your convenience daily to keep more accurate time. It was functioning normally at the time of listing, so it should continue to function without any issues. ■ChatGPT’s Evaluation of Watch Photos of front back and movement (A)Dial: The dial appears to be original. Positive observations include: Original "Seiko Crown" script, Original "Diashock 21 Jewels" printing, Attractive warm ivory patina developed over decades, Even aging across the surface, Clean minute track. There are only small age spots visible under close inspection, which are entirely consistent with a watch more than sixty years old. Overall the dial has aged gracefully. Rating: 9/10 (B)Movement : The movement is one of the highlights of this watch. Positive observations: Clean bridges, Original orange SEIKOSHA printing remains vivid, Jewels are bright Screw heads show little damage, No visible rust, No excessive oxidation, Balance area appears clean. This suggests the movement has received careful maintenance during its lifetime. Although photographs cannot confirm timing accuracy, visually the movement appears considerably cleaner than many surviving Crown movements. Overall movement condition: Excellent Vintage Condition Rating: 9.5 / 10 (C)Case: The EGP case remains remarkably attractive. Visible observations: Good polishing, Sharp lug geometry, No severe dents, only normal hairline scratches. There are some verdigris around the case-back gasket area, which is common for vintage gold-filled cases and suggests moisture exposure over many decades rather than structural damage. Overall, the gold filling appears well preserved. Condition: Very Good Rating: 9 / 10 (D)Case Back Inside the case back: Original circular pelage finish remains visible. Stamping is crisp and readable. Marked: EGP 20 MICRONS BACK GOLD FILLED This confirms a genuine thick gold-filled Seiko case rather than ordinary gold plating. The interior also carries the reference: 15002 matching the exterior model. This is a genuine, attractive, early-1960s Seiko Crown with its original Cal.560 movement and an appealing untouched dial. The watch remains a desirable example of one of Seiko's most historically important hand-wound models and a direct ancestor of the first Grand Seiko.