Seiko Cal. 5639 - 636

The 5639-636 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-3640400512d3]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1997

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