Seiko Cal. 3870 - 172

Seiko 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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