Seiko Cal. 6690 - 541

Released in 1977, the Cal. 6690 with design code 541 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-54593c476f65]

Also known as: Samurai, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1977

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