Seiko Cal. 4427 - 991

The Seiko 4427-991 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-e935f4cb81bf]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1973

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