Seiko Cal. 6691 - 336

The Seiko 6691-336 represents an important milestone in Seiko's 1987 lineup. It features a Black dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-663d116ed8b9]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1987

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