Seiko Cal. 6684 - 720

The 6684-720 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6684 caliber with 25j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-7ad7445c8d6e]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1990

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