Seiko Cal. 6616 - 738

The 6616-738 is a sought-after Quartz piece from Seiko's golden era. With its 20mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-a21bad392b0f]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1976

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