Seiko Cal. 6645 - 420

The Seiko 6645-420 represents an important milestone in Seiko's 1976 lineup. It features a Green dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-0450196517a7]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1976

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