Seiko Cal. 7121 - 657

The Seiko 7121-657 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-67ebe7cb1eb6]

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1971

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