Seiko Cal. 6644 - 397

The 6644-397 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-d781e7dc67de]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1987

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