Seiko Cal. 5656 - 641

The 5656-641 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5656 caliber with 34j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-a7914252b5e6]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1977

Related Models

• Seiko 7181-581
• Seiko 6389-999
• Seiko 5224-933
• Seiko 3893-970
• Seiko 3881-201
• Seiko 6181-994
• Seiko 4593-152
• Seiko 5251-495
• Seiko 4496-234
• Seiko 5230-638
• Seiko 6153-380
• Seiko 6258-508