Grand Seiko Heritage
Exterior:
Stainless steel (partly 18K yellow gold) Case back: Stainless steel and sapphire glass
Case back specifications:
Screw-type see-through case back
Glass material:
Dual curved sapphire
Case size:
40.0mm wide x 46.2mm long x 13.3mm thick
Clasp:
One-push three-fold type
Movement:
Mechanical automatic winding (with manual winding)