Seiko Cal. 3820 - 664

The Seiko 3820-664 represents an important milestone in Seiko's 1976 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-4a77ae854c5f]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1976

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