Seiko Cal. 3840 - 713

This Spring Drive model from 1976 features a 45mm Titanium case. Powered by the 3840 caliber with 17j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-e2beb55d4ec8]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1976

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