Seiko Cal. 4540 - 643

The Seiko 4540-643 represents an important milestone in Seiko's 1983 lineup. Powered by the 4540 caliber with 33j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-7186a0965174]

Also known as: Bellmatic, Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1983

Related Models

• Seiko 7160-478
• Seiko 7010-448
• Seiko 7144-728
• Seiko 0796-152
• Seiko 3825-174
• Seiko 3889-285
• Seiko 7195-586
• Seiko 4512-394
• Seiko 5259-893
• Seiko 6646-288
• Seiko 5214-829
• Seiko 6374-600