Seiko Cal. 3893 - 645

The Seiko 3893-645 represents an important milestone in Seiko's 1980 lineup. Powered by the 3893 caliber with 18j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-786df776c3c8]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1980

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