Seiko Cal. 5643 - 187

The 5643-187 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5643 caliber with 20j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-97e7eaa1c235]

Also known as: Samurai, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1976

Related Models

• Seiko 4444-361
• Seiko 7115-893
• Seiko 0798-608
• Seiko 0773-642
• Seiko 7195-263
• Seiko 6655-545
• Seiko 6116-419
• Seiko 7164-401
• Seiko 7047-301
• Seiko 6258-131
• Seiko 4415-801
• Seiko 5668-387