Seiko Cal. 5645 - 443

Released in 1979, the Cal. 5645 with design code 443 was part of Seiko's domestic market collection. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-383bd156ac64]

Also known as: Sumo, Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1979

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