Seiko Cal. 4597 - 770

The Seiko 4597-770 represents an important milestone in Seiko's 1990 lineup. Powered by the 4597 caliber with 21j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-be5ccf75ba94]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1990

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