Seiko Cal. 6640 - 395

Released in 1981, the Cal. 6640 with design code 395 was part of Seiko's domestic market collection. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-155cc1ce90dd]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1981

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