Seiko Cal. 6616 - 508

The Seiko 6616-508 represents an important milestone in Seiko's 1975 lineup. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-34c785ff7510]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1975

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