Seiko Cal. 6641 - 815

The Seiko 6641-815 represents an important milestone in Seiko's 1978 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-f0b82222f37a]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1978

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