• Item Details

Brand: CITIZEN
Model: 4-600851 Y Challenge Diver Day-Date
Movement: Automatic
Case Material: Stainless Steel
Case Size: 40mm (excluding crown)
Dial: Black Dial
Strap: Rubber Strap
Accessories: None

• Description

This CITIZEN 4-600851 Y Challenge Diver Day-Date features a bold vintage diver design with a practical day-date display and classic 1970s styling.

Produced in April 1975, it represents one of CITIZEN’s distinctive vintage diver models from the golden era of Japanese watchmaking.

Powered by an automatic movement, the watch offers reliable performance together with a strong vintage tool watch aesthetic.

Its 40mm case size and sporty design make it suitable for both everyday wear and vintage collections.

The watch was serviced in April 2026 and is running properly with a daily rate of approximately -4 to -9 seconds.