Seiko Cal. 5243 - 523

The 5243-523 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5243 caliber with 18j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-e56d2e1cb411]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

18j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1975

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