Seiko Cal. 6616 - 764

The Seiko 6616-764 represents an important milestone in Seiko's 1991 lineup. It features a Black dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-3e1f2a531d5b]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1991

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