Seiko Cal. 4538 - 435

The Seiko 4538-435 represents an important milestone in Seiko's 1986 lineup. Powered by the 4538 caliber with 20j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-325bdd3619f3]

Also known as: Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1986

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