Seiko Cal. 4420 - 727

The Seiko 4420-727 represents an important milestone in Seiko's 1992 lineup. Powered by the 4420 caliber with 30j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-6342cbd281fd]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1992

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