Seiko Cal. 6639 - 654

Released in 1981, the Cal. 6639 with design code 654 was part of Seiko's domestic market collection. It features a Cream dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-6dc6c5b66d8f]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

19j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1981

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