Seiko Cal. 3897 - 620

The Seiko 3897-620 represents an important milestone in Seiko's 1971 lineup. Powered by the 3897 caliber with 21j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-68aed754c632]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1971

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