Seiko Cal. 6643 - 657

The Seiko 6643-657 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-1a626f0cf195]

Also known as: Shogun, Panda

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1965

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