Seiko Cal. 3851 - 621

The Seiko 3851-621 represents an important milestone in Seiko's 1966 lineup. With its 19mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-40000d57ca53]

Also known as: Tuna, Panda

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1966

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