Seiko Cal. 3811 - 665

The Seiko 3811-665 represents an important milestone in Seiko's 1975 lineup. Powered by the 3811 caliber with 29j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-b6bea6e2f2ab]

Also known as: Monster, Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1975

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