Seiko Cal. 6660 - 735

The 6660-735 is a sought-after Solar piece from Seiko's golden era. Powered by the 6660 caliber with 28j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-3c341dba3f93]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1976

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