Seiko Cal. 6641 - 528

The Seiko 6641-528 represents an important milestone in Seiko's 1980 lineup. It features a White dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-340ad7fce77b]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1980

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