Seiko Cal. 5231 - 910

The 5231-910 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-47d37f662933]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

34j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1969

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