Seiko Cal. 5231 - 397

The 5231-397 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-d7e44dba1c36]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1973

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