Seiko Cal. 3840 - 666

The Seiko 3840-666 represents an important milestone in Seiko's 1978 lineup. It features a Navy dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-f244780ea463]

Also known as: Navigator, Arnie

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1978

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