Seiko Cal. 3891 - 187

Released in 1970, the Cal. 3891 with design code 187 was part of Seiko's domestic market collection. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-ece08da27268]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1970

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