Seiko Cal. 4443 - 931

This Spring Drive model from 1975 features a 40mm Titanium case. Powered by the 4443 caliber with 17j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-f2d0a3f5e0be]

Also known as: Monster, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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