Seiko Cal. 6656 - 543

Seiko 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

Related Models

seikata-wm-e4743b8e24ea