Seiko Cal. 5660 - 261

The Seiko 5660-261 represents an important milestone in Seiko's 1965 lineup. Powered by the 5660 caliber with 29j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-ea9ca6a78768]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1965

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