Seiko Cal. 5637 - 270

The 5637-270 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5637 caliber with 23j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-fa4f67323b7f]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1967

Related Models

• Seiko 7034-637
• Seiko 6116-693
• Seiko 6647-154
• Seiko 0781-186
• Seiko 7027-703
• Seiko 4432-258
• Seiko 6171-606
• Seiko 4481-938
• Seiko 5278-198
• Seiko 6252-465
• Seiko 6160-519
• Seiko 6689-470