Seiko Cal. 3850 - 689

The Seiko 3850-689 represents an important milestone in Seiko's 1988 lineup. Powered by the 3850 caliber with 20j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-216ae2a73b50]

Also known as: Tuna, Bellmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1988

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