Seiko Cal. 4576 - 312

The 4576-312 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4576 caliber with 18j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-231b05c7d141]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1978

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