Seiko Cal. 6621 - 618

The 6621-618 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6621 caliber with 31j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-ffaef8dbcfdf]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1997

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