Seiko Cal. 6641 - 851

The Seiko 6641-851 represents an important milestone in Seiko's 1965 lineup. It features a Green dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-53a7249ba4b9]

Also known as: Tuna, Pogue

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1965

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