Seiko Cal. 3870 - 172

The Seiko 3870-172 represents an important milestone in Seiko's 1970 lineup. Powered by the 3870 caliber with 31j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-366997880c95]

Also known as: Tuna, UFO

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1970

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