Seiko Cal. 4428 - 317

The Seiko 4428-317 represents an important milestone in Seiko's 1987 lineup. Powered by the 4428 caliber with 33j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-f46b18692220]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1987

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