Seiko Cal. 0781 - 688

The 0781-688 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0781 caliber with 17j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-e31f602b6498]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1990

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