Seiko Cal. 3821 - 720

The Seiko 3821-720 represents an important milestone in Seiko's 1976 lineup. Powered by the 3821 caliber with 20j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-9285ce39a84d]

Also known as: Bullhead, Rally

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1976

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