Seiko Cal. 6639 - 916

The 6639-916 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-3db4ad8d85aa]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1988

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