Seiko Cal. 6637 - 554

The Seiko 6637-554 represents an important milestone in Seiko's 1991 lineup. Powered by the 6637 caliber with 23j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-1a237613656f]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1991

Related Models

• Seiko 0716-839
• Seiko 7048-312
• Seiko 5219-317
• Seiko 7068-945
• Seiko 6191-482
• Seiko 6154-261
• Seiko 4457-578
• Seiko 6116-843
• Seiko 5654-137
• Seiko 6346-562
• Seiko 7159-402
• Seiko 7060-672