Seiko Cal. 6639 - 657

The 6639-657 is a sought-after Kinetic piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-900e3ab5c5ff]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1995

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