Seiko Cal. 6644 - 771

The Seiko 6644-771 represents an important milestone in Seiko's 1967 lineup. It features a Green dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-ffe1bfb71da3]

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1967

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