Seiko Cal. 4541 - 638

The Seiko 4541-638 represents an important milestone in Seiko's 1984 lineup. Powered by the 4541 caliber with 28j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-d1ba389ff089]

Also known as: Monster, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1984

Related Models

• Seiko 6616-560
• Seiko 4550-233
• Seiko 0798-232
• Seiko 4529-571
• Seiko 7192-168
• Seiko 4542-919
• Seiko 6380-460
• Seiko 6264-711
• Seiko 4484-981
• Seiko 3843-878
• Seiko 0729-447
• Seiko 4427-408