Seiko Cal. 6331 - 570

The 6331-570 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6331 caliber with 17j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-1926eaca87a8]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1965

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