Seiko Cal. 3840 - 180

The Seiko 3840-180 represents an important milestone in Seiko's 1977 lineup. Powered by the 3840 caliber with 34j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-68cc3d8453c0]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

34j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1977

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