Seiko - Liner 15010E Gold Filled - χωρίς τιμή ασφαλείας - 1812336 - Άνδρες - 1961

1961s Vintage Seiko Liner 15010E Manual Winding EGP Case Gold Filled Back Beautiful radial silver sunburst Dial 21Jewels Brand-new Leather Belt Men's Wristwatch Good

Condition:KM227
The Seiko Liner 15010E is a vintage manual wind men's wristwatch manufactured by Suwa Seikosha 諏訪精工舎. Experience one of Seiko's finest ultra-thin dress watches from the early 1960s. The Seiko Liner series represented Seiko's pursuit of elegance, precision, and slimness during Japan's rapid technological growth. Featuring a refined radial silver sunburst dial, an exceptionally slim gold-plated case, and the reliable 21-jewel manual-wind movement, this Liner remains one of the most understated yet technically sophisticated vintage Seiko dress watches of its era.

The Seiko Liner was introduced around 1960 as Seiko's premium ultra-thin manual-winding dress watch. During the late 1950s and early 1960s, The development philosophy behind the Liner focused on three major goals: producing an extremely thin movement, improving mechanical accuracy and offering elegant dress watches for businessmen. The Liner eventually became the direct technological predecessor to later luxury hand-wound Seiko families, including the Goldfeather, Cronos Special, and several early King Seiko models. Its movement architecture also contributed to Seiko's experience in designing high-grade thin calibers during the early 1960s.
This 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. Its production period is confirmed to be from 1963 to 1968. The SEIKO 402 series movement is a representative hand-wound caliber that emerged in the 1960s. It is a practical, slim mechanical movement found in watches such as the Skyliner. Its distinctive features include a 21-jewel movement, an 18,000 bph（vibrations per hour）movement, and a practical accuracy of approximately ±30seconds per day, ensuring highly stable accuracy at the time, as well as a date display.

Features:
■Brand Design: Seiko Liner
■Model Number: 15010E
■Product Number:1812336 Manufactured August 1961: Seiko serial numbers are six
digits long, with the first two digits indicating the year and month of manufacture. The
first number （1） indicates the first year of the 1960s, meaning the watch was
manufactured in 1961 The next letter （8）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 August 1961.
■Technical features of the Movement: Caliber 402 is not a completely different movement. It is essentially a simplified 3140 using the same overall architecture but with: fewer jewels,
simplified finishing and slightly lower production cost. Later this movement became the basis for the Skyliner series. This is the core movement used in the Liner 15010/15010E series, developed in the early 1960s.
• Movement Type: Manual winding hand-wind
• Frequency / Vibrations:18,000vph （vibrations per hour）, equivalent to 5 beats/sec — a low-beat standard for the era. Low-beat results in the classic vintage sweep and robust longevity （less wear on parts） but slightly less instantaneous precision than higher beat movements.
• Accuracy: approximately ±30 seconds per day, as cataloged at the time; Flat balance wheel, adjustable regulator.
• Day / date: No
• Number of jewels: 21 jewels
• Power Reserve: ~33 hours（typical for fully wound）though exact figures vary with condition and age. . Vintage movements often run slightly shorter if aged or not freshly serviced, due to age-related wear and metal fatigue in the mainspring
• Size / Dimensions: Diameter: Approximately 27.0 mm Thickness: Approximately （thin design）: The Liner series was based on the concept of a "thin dress watch," making this a fairly slim movement for its time.
• Lift angle:54.5º
• Hacking: No
• Functions: Hours, minutes, central seconds — straightforward
• Production: Circa early to late 1960s (e.g.,1961for Ref.15010） Manufactured at Seiko’s Suwa facility (Nagano Prefecture, Japan)
• From the late 1950s to the 1960s, Seiko accelerated movement development with the themes of "thinness, high precision, and luxury." The 150 series was developed specifically for dress watches. At the time, many Japanese-made watches were thick, so the thinness of the 150 series was a major feature.
■Materials:
• Case: EGP Gold
• Case Back: EGP（Seiko Gold Plated)20Microns Back inside shows Product Number: 1812336 inscription of GOLD-FILLED 1510E LN Overhauled records shows 60.4.26 meaning April 26th 1985
• Dial: Beautiful fancy radial silver sunburst disk with classic bar indexes and Dauphine 3 hands display combined for both legibility and elegance.
• Case Size:35mmexcluding crown X 43mm including case lug Thickness: 8mm
• Weight:32.1gms
• Band: Brand-new Leather Band and 21cm wrist circumference with 5cm less adjustable in 8 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 excellent good pre-owned vintage condition and is currently in good working order. There are very minor scratches and signs of wear on the case and crystal consistent with normal use over time.
Case: ALL EGP 20 Micron cases show 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.
Tested by manual winding three times during July 2026, the power reserve was 15, 20 and 23 hours respectively.so power reserve is slightly shorter than 33hours when it was new due to metal fatigue in the mainspring over 60 years usage. It is suggested to wind the mainspring gently and quietly. Careful handling, when winding and setting time, is required due to a real vintage watch. The watch is in excellent good condition overall and still does work precisely. As the movement and lubrication are in good condition, it is suitable for daily wear if wounded and worn regularly. It needs to be manually 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 comment/evaluation on photos of the watch and inside movement
(A) Evaluation of your movement: I would grade it surprisingly highly.
The movement is particularly impressive. Positive observations include: Clean bridges, Bright plating, Original gold-filled engravings, Clean jewel settings, No visible corrosion
Screw heads remain sharp and No obvious amateur repair marks. The movement appears well preserved. The visible gear train shows clean teeth with no noticeable oxidation. Jewels: All visible jewels. look bright with no visible cracks. Very good.
Screw condition: Excellent. No damaged slots. This usually indicates careful servicing.
Balance: Balance wheel appears straight. No visible damage. Regulator is near the middle of its adjustment. This is a good sign.
Overall, it gives the impression of a carefully maintained vintage movement.
(B)Evaluation of the dial: This is actually one of the nicest parts. Positive: Beautiful radial silver-gold sunburst. The brushing remains sharp. Printing is crisp. Logo is excellent. No moisture spots. No repaint evidence. The applied markers remain straight. Hands appear original.
(C)Case: Gold-plated (EGP) The plating is still attractive. This photograph beautifully demonstrates one of the Liner's defining characteristics: its extremely thin case. Compared with contemporary Seiko Crown models, the Liner appears noticeably slimmer, giving it a refined dress-watch profile.
Overall Score 9.4 / 10
This 1961 Seiko Liner 15010E is an elegant and well-preserved example of Seiko's early ultra-thin dress-watch engineering. The clean radial silver sunburst dial, attractive EGP 20-micron gold-plated case with gold-filled back, visually excellent 21-jewel J140 manual movement, and tasteful new leather strap combine to create a highly desirable collector's piece. It is an excellent representative of the Liner series and a fine addition to any collection focused on early 1960s Japanese mechanical watches.