Seiko Cal. 4440 - 643

Released in 1970, the Cal. 4440 with design code 643 was part of Seiko's domestic market collection. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-f530ff8be5e2]

Also known as: Shogun, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1970

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