Seiko Cal. 5684 - 121

The Seiko 5684-121 represents an important milestone in Seiko's 1970 lineup. Powered by the 5684 caliber with 22j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-ffca120e3d0d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1970

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