Seiko Cal. 6658 - 816

The Seiko 6658-816 represents an important milestone in Seiko's 1987 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-5ebf9a4b74d5]

Also known as: Turtle, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1987

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