Seiko Cal. 3820 - 646

The Seiko 3820-646 represents an important milestone in Seiko's 1974 lineup. Powered by the 3820 caliber with 18j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-883239051e81]

Also known as: Silverwave, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1974

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