Seiko Cal. 3840 - 284

The Seiko 3840-284 represents an important milestone in Seiko's 1980 lineup. It features a Navy dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-1e32c6ea6037]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1980

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