Seiko Cal. 0766 - 509

The 0766-509 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0766 caliber with 35j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-f2733ac34bda]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1993

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