Light-powered quartz movement, caliber 7B24
In power saving mode - 1.5 years of work in the dark
Perpetual calendar, date
Steel case and bracelet
Sapphire crystal with anti-reflective coating
Water resistance 100 meters
Dimensions: watch height 44.9 mm, width 38.4 mm, thickness 8.8 mm
Weight about 97 g
The crown is twisted
Overcharge prevention function
Energy saving function
Full automatic calendar function (until December 31, 2099)
Radio correction function (reception of standard radio waves in Japan, China, USA)
Automatic and forced radio sync
Made in Japan for the domestic market
Issued 1,500 copies.