Seiko Cal. 6690 - 521

The 6690-521 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-695686d563aa]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1993

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