Seiko Cal. 6616 - 510

This Hand-Winding model from 1968 features a 37mm Two-Tone case. With its 18mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-824b328ca8a5]

Also known as: Helmet, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1968

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