Lug widthsBrandsGuides Smartwatch bands How to measure

    Grand Seiko Spring Drive "Snowflake" SBGA211

    WatchReference SBGA211
    20 mm
    Standard strap width
    20 mm

    The Grand Seiko Spring Drive "Snowflake" has a 20 mm lug width.

    ✓ Matches the manufacturer's specifications
    See all 20 mm watches How to measure

    Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size. Report an error

    Strap and attachment

    Lug width
    20 mm

    The watch

    Brand
    Grand Seiko
    Collection
    Heritage Collection
    Model
    Spring Drive "Snowflake"
    Reference
    SBGA211
    Version
    SBGA211 (titanium bracelet, snowflake dial)
    Type
    Watch
    Case size
    41 mm
    Lug to lug
    49 mm

    Story

    History

    The Snowflake began as the SBGA011, which had Seiko branding at 12 and Grand Seiko at 6. The SBGA211 replaced it in 2017, when Grand Seiko watches began carrying only Grand Seiko branding.

    The silver-plated dial imitates snow shaped by wind on the Hotaka mountains, which can be seen from the Shinshu Watch Studio where Spring Drive watches are made.

    Grand Seiko dates the Spring Drive idea to 1977, sold the first Spring Drive watch in 1999, and launched its Grand Seiko 9R calibres in 2004. The 9R65 was its first automatic Spring Drive.

    What it brought to the industry

    Spring Drive uses a mainspring for power and a quartz oscillator for regulation. A magnetic brake lets the seconds hand glide instead of tick, and Grand Seiko rates the 9R65 at about one second a day.

    According to Grand Seiko, the 9R calibre was the first Spring Drive with automatic winding and a 72-hour power reserve.

    The case is made of Grand Seiko's high-intensity titanium, which the brand says is about 30% lighter than stainless steel.

    Other versions

    ReferenceWhat is differentStrap size
    SBGA011Grand Seiko Snowflake (original)The earlier reference, with "Seiko" at 12 and "Grand Seiko" at 6 on the dial. It was replaced by the SBGA211.Not verified

    More references in the same line

    Questions

    What strap size does the Grand Seiko Spring Drive "Snowflake" take?

    A 20 mm strap. Lug width is the gap between the lugs, and the strap must match it exactly.

    Also 20 mm

    All 20 mm lug width watches

    Help

    What is lug width?

    The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

    Measure it in 30 seconds

    1. Take the strap off, or look at the back of it: many straps print their width.
    2. Measure the inside gap between the lugs with a caliper or a millimetre ruler.
    3. Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

    Strap, quick release or system?

    Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.

    Where this comes from

    Grand Seiko, StrapsCo, Time+Tide, Worn & Wound.