Seiko Cal. 3891 - 770

The 3891-770 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-9e301dcfe243]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1977

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