Seiko Cal. 4437 - 905

The Seiko 4437-905 represents an important milestone in Seiko's 1985 lineup. Powered by the 4437 caliber with 29j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-e84d0cee51fb]

Also known as: Sportsmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1985

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