Seiko Cal. 6620 - 987

This Hand-Winding model from 1989 features a 34mm Stainless Steel case. Powered by the 6620 caliber with 30j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-6ae0a15e0e9f]

Also known as: Bullhead, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1989

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