Seiko Cal. 4543 - 644

The Seiko 4543-644 represents an important milestone in Seiko's 1979 lineup. Powered by the 4543 caliber with 29j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-47ec1fad5dbe]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1979

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