Seiko Cal. 3897 - 872

The Seiko 3897-872 represents an important milestone in Seiko's 1969 lineup. Powered by the 3897 caliber with 28j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-aa0a43641f96]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1969

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