Seiko Cal. 5661 - 442

The Seiko 5661-442 represents an important milestone in Seiko's 1974 lineup. Powered by the 5661 caliber with 30j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-f0bbaaeda399]

Also known as: Monster, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1974

Related Models

• Seiko 7119-313
• Seiko 4542-977
• Seiko 7197-688
• Seiko 5220-829
• Seiko 7032-708
• Seiko 5662-627
• Seiko 3817-811
• Seiko 0720-999
• Seiko 4579-199
• Seiko 5660-350
• Seiko 5232-266
• Seiko 5268-206