Seiko Cal. 7031 - 538

This Hand-Winding model from 1978 features a 39mm Two-Tone case. With its 19mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-35488b3e3c8d]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1978

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