Seiko Cal. 6646 - 877

The Seiko 6646-877 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-ec9c943de20b]

Also known as: Bullhead, Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1978

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