Seiko Cal. 0755 - 643

The Seiko 0755-643 represents an important milestone in Seiko's 1990 lineup. Powered by the 0755 caliber with 33j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-b6b1f3fd1efb]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1990

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