Seiko Cal. 6220 - 531

The Seiko 6220-531 represents an important milestone in Seiko's 1968 lineup. Powered by the 6220 caliber with 21j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-8bd41fa5daf4]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1968

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