Seiko Cal. 4431 - 797

The 4431-797 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e637100b2eb5]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1985

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