Seiko Cal. 5689 - 637

The 5689-637 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5689 caliber with 24j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-aa270cbc26bc]

Also known as: Panda, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1979

Related Models

• Seiko 7198-464
• Seiko 5662-567
• Seiko 3865-766
• Seiko 6135-339
• Seiko 3873-237
• Seiko 6150-317
• Seiko 7156-111
• Seiko 5625-517
• Seiko 4554-137
• Seiko 6257-742
• Seiko 6347-830
• Seiko 7152-775