Seiko Cal. 5231 - 756

The Seiko 5231-756 represents an important milestone in Seiko's 1969 lineup. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-8257dedd91f3]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1969

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