Seiko Cal. 3851 - 380

The Seiko 3851-380 represents an important milestone in Seiko's 1998 lineup. Powered by the 3851 caliber with 27j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-07ca2c3649e4]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1998

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