Seiko Cal. 6320 - 578

The 6320-578 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6320 caliber with 23j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-6c388c48f4bc]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1971

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