Seiko Cal. 6661 - 556

The Seiko 6661-556 represents an important milestone in Seiko's 1993 lineup. Powered by the 6661 caliber with 19j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-90918e26c8dd]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1993

Related Models

• Seiko 5639-887
• Seiko 6126-376
• Seiko 5628-780
• Seiko 6247-651
• Seiko 7179-309
• Seiko 6249-948
• Seiko 6164-752
• Seiko 7058-289
• Seiko 4420-795
• Seiko 6397-262
• Seiko 6155-771
• Seiko 3886-679