Seiko Cal. 6690 - 354

The Seiko 6690-354 represents an important milestone in Seiko's 1971 lineup. Powered by the 6690 caliber with 24j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-da546e870c3c]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1971

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