Seiko Cal. 5231 - 307

The Seiko 5231-307 represents an important milestone in Seiko's 1970 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-af70b1cfeb9e]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1970

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