Seiko Cal. 5231 - 311

This Spring Drive model from 1969 features a 42mm Two-Tone case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-c122f8481e27]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1969

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