Seiko Cal. 3870 - 918

This Hand-Winding model from 1969 features a 44mm Titanium case. Powered by the 3870 caliber with 19j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-f07140e5e11d]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1969

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