Seiko Cal. 3820 - 987

The Seiko 3820-987 represents an important milestone in Seiko's 1974 lineup. Powered by the 3820 caliber with 31j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-e66c4cc2f4cc]

Also known as: Silverwave

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1974

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