Seiko Cal. 7181 - 823

The 7181-823 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-bc5e5cd880cc]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1970

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