Seiko Cal. 6678 - 657

The Seiko 6678-657 represents an important milestone in Seiko's 1981 lineup. Powered by the 6678 caliber with 36j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-3d7965a6c1c9]

Also known as: UFO, Bellmatic

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1981

Related Models

• Seiko 5249-735
• Seiko 3857-924
• Seiko 7170-963
• Seiko 5632-767
• Seiko 4461-735
• Seiko 5686-247
• Seiko 0770-629
• Seiko 4460-934
• Seiko 4544-300
• Seiko 6216-684
• Seiko 6136-845
• Seiko 6145-607