Seiko Cal. 6321 - 531

The 6321-531 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6321 caliber with 17j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-a574369dc7e5]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

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