Seiko Cal. 6621 - 643

The Seiko 6621-643 represents an important milestone in Seiko's 1991 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ec616c6f1e54]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1991

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