Seiko Cal. 3891 - 131

Released in 1972, the Cal. 3891 with design code 131 was part of Seiko's domestic market collection. It features a White dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-6e684fc56da0]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1972

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