Seiko Cal. 5639 - 957

The Seiko 5639-957 represents an important milestone in Seiko's 1981 lineup. Powered by the 5639 caliber with 24j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-69fefb0bc18d]

Also known as: Turtle

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1981

Related Models

• Seiko 6299-519
• Seiko 6180-357
• Seiko 4492-852
• Seiko 4482-657
• Seiko 7155-855
• Seiko 4438-784
• Seiko 5214-723
• Seiko 4585-224
• Seiko 7130-383
• Seiko 7174-798
• Seiko 6318-324
• Seiko 0715-518