Seiko Cal. 6643 - 693

The Seiko 6643-693 represents an important milestone in Seiko's 1973 lineup. It features a Green dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-8784383948dd]

Also known as: Monster, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1973

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