Seiko Cal. 4491 - 687

The Seiko 4491-687 represents an important milestone in Seiko's 1987 lineup. It features a Navy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-80205a3e92af]

Also known as: Tuna, Navigator

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1987

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