CASIO EFK-110D-1AJF Automatic with Manual Wind Elegant Black Design Stainless Steel Case Water ResistantProduct Highlights Speed & IntelligenceThe EDIFICE mechanical series "EFK 110" embodies the passion for driving and exquisite design beauty. Equipped with a Japanese automatic mechanical movement in a compact 38mm case. It features approximately 42 hours of power reserve, 10 ATM water resistance, and sapphire glass, providing sufficient specifications for everyday use. The see through back allows you to admire the delicate movement of the mechanism,