Seiko Cal. 5657 - 492

The Seiko 5657-492 represents an important milestone in Seiko's 1970 lineup. Powered by the 5657 caliber with 24j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-7b07e810d342]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1970

Related Models

• Seiko 7146-219
• Seiko 3895-708
• Seiko 6267-372
• Seiko 6332-796
• Seiko 6158-736
• Seiko 7086-337
• Seiko 6631-403
• Seiko 6349-198
• Seiko 5286-937
• Seiko 6336-929
• Seiko 4581-138
• Seiko 4515-774