Seiko Cal. 6642 - 550

The Seiko 6642-550 represents an important milestone in Seiko's 1972 lineup. It features a Black dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-1220c1c93b50]

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1972

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