Seiko Cal. 4428 - 437

The Seiko 4428-437 represents an important milestone in Seiko's 1992 lineup. Powered by the 4428 caliber with 25j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-0f803f828966]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1992

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