Seiko Cal. 6639 - 853

This Hand-Winding model from 1984 features a 41mm Gold-Plated case. Powered by the 6639 caliber with 28j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-ebaf8c52beb0]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1984

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