This is a rare 1964 Tokyo Olympics model featuring the Olympic torch mark. The time difference isn't known, but it's working without issue. The calendar function also works. Sold as is. A silver SEIKO automatic watch with analog display and date function. - Brand: SEIKO - Model Name: Automatic Watch - Color: Silver - Band Material: Stainless Steel - Features: Analog display, date display, rotating bezel Thank you for viewing.