Seiko Cal. 6616 - 637

Released in 1997, the Cal. 6616 with design code 637 was part of Seiko's domestic market collection. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-2c4b448ef6d3]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1997

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