Seiko Cal. 3820 - 660

The Seiko 3820-660 represents an important milestone in Seiko's 1978 lineup. Powered by the 3820 caliber with 31j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-53a845cd0292]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1978

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