Seiko Cal. 4415 - 680

The 4415-680 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4415 caliber with 26j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-3802d85ceee9]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1981

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