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SEIKO · SBTR027 · SELECTION 8T CHRONOGRAPH · BLUE-GREY DIAL · JDM
SEIKO SELECTION 8T Chronograph with two-layer blue-grey dial.
A men's chronograph from SEIKO's SELECTION line, featuring a textured two-layer blue-grey dial and the Japan-made 8T63 quartz chronograph movement. 39.8 mm stainless steel case, 10-bar water resistance, date function, tachymeter, and 24-hour subdial. Suitable for both business and casual wear. Japanese domestic specification.
● Specifications
Item Detail
Brand / LineSEIKO — SELECTION (Japanese Domestic Model)
Model / ReferenceSBTR027 · 8T Chronograph
MovementSEIKO Caliber 8T63 · quartz chronograph · made in Japan
Accuracy±15 seconds / month (average)
Battery LifeApprox. 3 years
Functions1/5-second chronograph (60-minute counter) · 24-hour subdial · small seconds · date · tachymeter
Case MaterialStainless steel
CrystalHardlex (SEIKO's hardened mineral glass)
BraceletStainless steel · 20 mm lug width · three-fold clasp
Case Diameter39.8 mm
Case Thickness11.7 mm
Lug-to-Lug47.0 mm
WeightApprox. 130 g (full bracelet)
Water Resistance10 bar (100 m / suitable for swimming & light snorkeling)
LumeLumiBrite on hands and indices
Dial ColorBlue-grey · two-layer construction
JAN Code4954628450456
ConditionBrand-new, unused, with manufacturer's tag
In the package: watch × 1 · original SEIKO box · Japanese instruction manual · manufacturer's warranty card (Japan-issued — international service typically routed via SEIKO Japan or your local SEIKO service center on a goodwill basis). The watch is battery-powered; no voltage or regional compatibility concerns.
● Why this one
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Two-layer blue-grey dial
The dial is built from two stacked plates — the outer chapter ring on one plane and the sub-counter recess on another — creating depth that catches light differently as the wrist moves. A subtle, well-executed touch usually found on watches at a higher tier.
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Color shift with the light
In low light the dial reads as a deep navy; under direct sunlight it brightens into a silvery blue-grey. The same watch wears differently across an office, a restaurant, and an outdoor lunch — without ever being loud.
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SEIKO 8T63 caliber, made in Japan
The 8T63 is SEIKO's mainstay quartz chronograph movement, with 1/5-second timing up to 60 minutes, ±15 sec/month accuracy, and a three-year battery. A reliable, well-known caliber that's straightforward for any watchmaker to service.
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39.8 mm — fits most wrists
Case diameter 39.8 mm, lug-to-lug 47.0 mm, thickness 11.7 mm. Compact enough to slide under a dress cuff, balanced enough to wear with a t-shirt. Suits wrist sizes from roughly 6.5" to 8".
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10-bar water resistance
Rated for 100 meters — comfortable for swimming, beach trips, and rain. Hardlex crystal resists scratches from daily wear. A practical chronograph you can wear without worrying about each splash or knock.
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Japanese domestic specification
SBTR-prefixed references are SEIKO's Japan-only catalogue. Same factory and movement as global SEIKO, but with packaging and reference codes specific to the JDM market that collectors often seek out.
● Buying from OrigamiSelect
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Sourced in Japan
Purchased from authorized Japanese SEIKO retailers. 100% genuine JDM with manufacturer's tag — not grey-market, not reconditioned.
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Brand-new in box
Unused in original SEIKO packaging with manual and warranty card. We cover any defects ourselves for your peace of mind.
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Padded & Protected
Double-boxed and cushioned for international transit. Dispatched from Saitama, Japan.
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Fast, Human Answers
Questions replied to within 24 hours — before and after your purchase.
OrigamiSelect
Licensed Antique & Secondhand Dealer — Japan
古物商許可番号：第431030066069号　埼玉県公安委員会
Shipping from Saitama, Japan · All items sourced and dispatched domestically