Seiko Cal. 6635 - 722

The Seiko 6635-722 represents an important milestone in Seiko's 1975 lineup. Powered by the 6635 caliber with 30j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-43bc8d7a89f9]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1975

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