Seiko Cal. 6331 - 285

The 6331-285 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6331 caliber with 36j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-ddeeaa8f1bb9]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1987

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