Seiko Cal. 3818 - 640

The Seiko 3818-640 represents an important milestone in Seiko's 1966 lineup. It features a Cream dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-be691bde19d3]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1966

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