Seiko Cal. 6639 - 761

The 6639-761 is a sought-after Spring Drive piece from Seiko's golden era. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-282fd5de7eff]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1991

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