Seiko Cal. 3821 - 963

The Seiko 3821-963 represents an important milestone in Seiko's 1965 lineup. Powered by the 3821 caliber with 24j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-152d5a6b0d12]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1965

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