Seiko Cal. 6388 - 355

This Spring Drive model from 1969 features a 42mm Titanium case. With its 19mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-c41294b10916]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1969

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