Seiko Cal. 3840 - 620

Released in 1967, the Cal. 3840 with design code 620 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-af3fb821ad0b]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1967

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