Seiko Cal. 5640 - 229

The Seiko 5640-229 represents an important milestone in Seiko's 1970 lineup. Powered by the 5640 caliber with 36j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-a7a30681e862]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1970

Related Models

• Seiko 6216-890
• Seiko 7041-740
• Seiko 3899-256
• Seiko 3830-281
• Seiko 7141-594
• Seiko 7072-801
• Seiko 5282-903
• Seiko 7172-804
• Seiko 4573-973
• Seiko 6263-633
• Seiko 0783-263
• Seiko 0744-940