Seiko Cal. 6645 - 543

This Spring Drive model from 1978 features a 44mm Two-Tone case. It features a Green dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-e7b2554f9898]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1978

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