Seiko Cal. 3840 - 854

Released in 1978, the Cal. 3840 with design code 854 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-8737d67c2c92]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1978

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