Seiko Cal. 6657 - 927

Released in 1975, the Cal. 6657 with design code 927 was part of Seiko's domestic market collection. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-0265ad9ea263]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1975

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