Seiko Cal. 6643 - 326

The Seiko 6643-326 represents an important milestone in Seiko's 1970 lineup. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-d70e2a722c51]

Also known as: Silverwave

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1970

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