Seiko Cal. 6639 - 210

The 6639-210 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-d5f67c944933]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1986

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