Seiko Cal. 6621 - 954

The 6621-954 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6621 caliber with 26j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-bbea12b4087c]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1976

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