Seiko Cal. 6621 - 618

Seiko 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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