Seiko Cal. 6639 - 982

The Seiko 6639-982 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-414518c16491]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1978

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