Seiko Cal. 6321 - 640

The 6321-640 is a sought-after Solar piece from Seiko's golden era. Powered by the 6321 caliber with 28j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-3e77db5cb7ed]

Also known as: Bullhead, Helmet

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1999

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