Seiko Cal. 0766 - 503

The 0766-503 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0766 caliber with 21j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-9cea64a764e9]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1972

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