Seiko Cal. 4447 - 377

The Seiko 4447-377 represents an important milestone in Seiko's 1991 lineup. Powered by the 4447 caliber with 19j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-b2e6fae7f2a7]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1991

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