Seiko Cal. 6656 - 543

The Seiko 6656-543 represents an important milestone in Seiko's 1968 lineup. Powered by the 6656 caliber with 19j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-e4743b8e24ea]

Also known as: Tuna, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1968

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