Seiko Cal. 5621 - 831

The 5621-831 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-7fd443ef1d47]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1990

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