Seiko Cal. 4555 - 642

The Seiko 4555-642 represents an important milestone in Seiko's 1969 lineup. Powered by the 4555 caliber with 18j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-8491dcaa6149]

Also known as: UFO, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1969

Related Models

• Seiko 4517-381
• Seiko 6112-493
• Seiko 0735-548
• Seiko 6320-625
• Seiko 5294-678
• Seiko 3855-521
• Seiko 3873-800
• Seiko 3884-947
• Seiko 6333-233
• Seiko 7173-398
• Seiko 3842-189
• Seiko 6626-267