Seiko Cal. 6636 - 640

This Hand-Winding model from 1982 features a 40mm Stainless Steel case. It features a Cream dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-ebd0784ea4aa]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1982

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