Seiko Cal. 4427 - 536

The Seiko 4427-536 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-381489053537]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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