Seiko Cal. 3820 - 677

The 3820-677 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-699c2fa6ee0b]

Also known as: Navigator, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1978

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