Seiko Cal. 5646 - 447

The Seiko 5646-447 represents an important milestone in Seiko's 1987 lineup. Powered by the 5646 caliber with 31j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-f17fc22eb83d]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1987

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