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GRAND SEIKO SBGM255

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Grand Seiko SBGM255 Specifications

Exterior
Case MaterialStainless steel
Case BackStainless steel and sapphire crystal. See-through with 6 screws
Glass MaterialBox shaped sapphire crystal
Glass CoatingAnti-reflective coating on inner surface
Band MaterialBlack crocodile leather
Bezel MaterialFixed polished stainless steel
Dial ColorWhite textured geometrical spiral pattern with engraved Grand Seiko logo below the 12 o’clock position and Automatic GMT logo at 6 o’clock position
Dial HandsTempered silver tone hour, minute, second hand and blue GMT hand with Zaratsu polished
Dial MarkersSilver tone batons indexes with Zaratsu polished
CrownScrew down at 3 o’clock position
Case sizeDiameter 39.5 mm × Thickness 14.1 mm
Lug to lug46.9 mm
Band width19 mm
The perimeter of Band192 mm
Clasp typeThree-fold clasp with push button release

 

Movement
Caliber no9S66    Instructions
Movement TypeAutomatic with manual winding
Power reserveApproximately 72 hours (3 days)
Mean daily rate+5 to -3 seconds per day

*Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.

Vibrations28,800 vibrations per hour (8 beats per second)

 

Functions / Specifications
Water resistanceSplash Resistant
Magnetic resistanceEquipped (4,800 A/m)
Weight92 g
FunctionsHour, minute, second hand, GMT hand, date window at 3 o’clock
Features
  • 35 jewels
  • 24-hour hand (dual time display function)
  • Calendar-linked time difference adjustment function
  • Date display
  • See-through case back

Reference : Grand Seiko SBGM255G

Description

About Grand Seiko SBGM255

Grand Seiko Automatic Mechanical GMT Elegance Collection

A classic mechanical GMT, the “Snowdrop” expresses the gleam of snow melting in spring sunshine

As winter’s cold gives way to the warmth of spring, melting snow forms droplets that glisten under bright sunshine. The SBGM255 “Snowdrop” captures the beauty of this richly symbolic seasonal moment. Thanks to its modern geometric spiral pattern, the dial changes in appearance based on the angle of the light, just as melting snow refracts rays of spring sunshine. The intricate pattern imparts a refined sense of structure, a fitting complement to the Zaratsu-polished case and the high precision of the Caliber 9S66 GMT movement. Prized for its accuracy, beauty, and reliability, this movement enables the wearer to track two time zones simultaneously. The tempered blue GMT hand can be set to one’s home time or any time zone of one’s choosing. The local hour can be changed in one-hour increments when the crown is extended to the first click position, making time zone adjustments simple and intuitive. The power reserve is approximately three days.

Grand Seiko SBGM255 Features

Expressing a poignant moment of changing seasons

Grand Seiko SBGM255 Design

As spring awakens from winter’s slumber, the power of the seasons is vividly felt in Shizukuishi, the home of Grand Seiko mechanical watchmaking. The watch’s dial evokes the time of year when winter snow melts and the droplets gleam beautifully in spring’s warm sunshine. Against this patterned white dial, a GMT hand tempered to a beautiful shade of blue tells the time in 24 time zones and endows the design with a vivid three-dimensional presence.

 

Sophisticated and graceful design

Grand Seiko SBGM255 Dial

Before the Grand Seiko Style was established, the very first Grand Seiko watch was born in 1960. Its spirit lives on in the case design of this model, which blends classic elegance with modern refinement. The watch’s round form presents a gentle silhouette from every angle. Though seemingly simple, the lugs feature an intricate slope that widens toward the tip, accentuating the distortion-free mirror surface and delicate ridgelines created through Zaratsu polishing. The brilliant shine of the case, created by our craftspeople, adds a touch of tension to the classic aesthetic, resulting in a sophisticated and graceful design.

  • 35 jewels
  • 24-hour hand (dual time display function)
  • Calendar-linked time difference adjustment function
  • Date display
  • See-through case back

Grand Seiko SBGM255 History

Prior to 1960, to challenge the status of Swiss watches and change the perception of Japanese watches, Daini Seikosha and Suwa began the discussion of a product line that can match the quality of Swiss watches under the suggestion of the parent company. At the time, Suwa Seikosha Co. was in charge of manufacturing men’s watches, so it was decided that Suwa would be producing the first Grand Seiko (GS).

The first Grand Seiko was released in 1960, it was based on Seiko’s previous high-end watch, CROWN. This Grand Seiko has a 25-jewel, manual-winding, 3180 caliber, and only 36,000 units were produced. This was also the first chronometer-grade watch manufactured in Japan, and it was based on Seiko’s own chronometer standard.

Design style

The design language of the Grand Seiko was set in 1967, with the creation of Grand Seiko 44GS. The 44GS set the ground for all future Grand Seiko with nine elements. These elements help improve the legibility of the watch under different situations, and create a sharp, crisp visual impression:

  1. Double width index at 12 o’clock
  2. Multi-faceted rectangular markers
  3. Highly polished bezel
  4. Highly polished planes and two-dimensional surface
  5. Half recessed crown
  6. Flat dial
  7. Multi-faceted hour and minute hands
  8. Curved side line
  9. Reverse slanted bezel wall and case side
  10. Dress style with simple but beautiful design
  11. Zaratsu polishing

source : wikipedia

Grand Seiko SBGM255 Features

Additional information

Weight2 kg
Dimensions5 × 4 × 2 cm

Seiko Service Center

Center NameAddressTelFax
Seiko Service Center JakartaJalan Melawai IX No. 46, Blok M, Jakarta Selatan, Indonesia+62-21-7208717+62-21-7201249
Seiko Service Center JakartaPlaza Senayan Lt 3 No. 353-A, Jakarta Pusat, Indonesia+62-21-5725689

+62-21-5725690

Seiko Service Center JakartaLt Dasar No. 115-116, Gd. Harco Pasar Baru, Jakarta Pusat, Indonesia+62-21-3452335
Seiko Service Center SurabayaJalan Tunjungan No. 98-100, Surabaya, Indonesia+62-31-5474756

+62-31-5474757

+62-31-5347771
Seiko Service Center SurabayaPlaza Surabaya, Lt 1 No. 56-57, Surabaya, Indonesia+62-31-5316199
Seiko Service Center MedanJalan Cirebon No. 16, Medan, Indonesia+62-61-4149636
Seiko Service Center MedanSun Plaza Level 1, Blok C-32, Medan, Indonesia+62-61-4501505

Size Guide

Wrist circumferenceSuitable case sizes
5.5 in / 14 cm34 mm36 mm38 mm
6.0 in / 15.2 cm36 mm38 mm40 mm
6.5 in / 16.5 cm38 mm40 mm42 mm
7.0 in / 17.8 cm40 mm42 mm44 mm
7.5 in / 19 cm42 mm44 mm46 mm
8.0 in / 20.3 cm44 mm46 mm48 mm

Watch Size Guide

Water Resistance

Water Resistant Chart

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