Seiko Cal. 6231 - 687

This Hand-Winding model from 1975 features a 40mm Titanium case. With its 20mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-2e6923c303a0]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1975

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