Seiko Cal. 3815 - 321

The Seiko 3815-321 represents an important milestone in Seiko's 1988 lineup. Powered by the 3815 caliber with 32j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-eceba65ddea4]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1988

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