The SBGA407, also called Skyflake by connoisseurs, is Grand Seiko's version of the very popular SBGA11 Snowflake. The rough, snowy dial reflects the winter beauty of the Shinshu area in Japan. The beauty of the Snowflake dial is enhanced by the subtle blue color scheme of the SBGA407.
The essence of Grand Seiko
The elegant, classic design embodies the philosophy of Grand Seiko. Precision, beauty and legibility are reflected in the Spring Drive 9R65 caliber, the Zaratsu polished case and the steel blue second hands. The Skyflake has a maximum power reserve of three days (72 hours), with an indicator on the dial. The impressive movement is visible through the transparent back of the case.
Transparent case back
The Skyflake has a maximum power reserve of three days (72 hours), with an indicator on the dial. The impressive movement is visible through the transparent back of the case.
"Automatic Spring drive 3-day"
Our company unveiled Spring Drive in 1999, but the lack of a sufficiently effective automatic winding mechanism and a power reserve of 72 hours prevents its acceptance in the Grand Seiko line. After another four years of development, the first Grand Seiko 9R Spring Drive was made.
The winding system and driving time were improved from the existing 48-hour manual winding system to an automatic 72-hour power reserve. The automatic winding mechanism uses Seiko's original Magic Lever mechanism, developed in 1959, but with improved productivity, maintainability and durability to improve winding efficiency.
Calibre 9R65 is currently the most standard of the 9R Spring Drive movements and is used in many Grand Seiko models.