Seiko Cal. 6657 - 861

The Seiko 6657-861 represents an important milestone in Seiko's 1999 lineup. With its 18mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-250509471e2b]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1999

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