Seiko Cal. 3880 - 692

The Seiko 3880-692 represents an important milestone in Seiko's 1970 lineup. Powered by the 3880 caliber with 20j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-bf162eb1ac61]

Also known as: Tuna, Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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