Seiko Cal. 3851 - 521

The Seiko 3851-521 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-e7dcc7cc06b2]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1972

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