Seiko Cal. 5681 - 620

The 5681-620 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5681 caliber with 18j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-cffd77d7cf2e]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1965

Related Models

• Seiko 4569-726
• Seiko 6149-429
• Seiko 6257-836
• Seiko 6133-208
• Seiko 6366-182
• Seiko 0721-185
• Seiko 6256-819
• Seiko 5252-900
• Seiko 7146-558
• Seiko 3848-505
• Seiko 4575-445
• Seiko 4555-867