Seiko Cal. 5687 - 740

Released in 1980, the Cal. 5687 with design code 740 was part of Seiko's domestic market collection. Powered by the 5687 caliber with 34j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-20946cc54cf1]

Also known as: UFO, Sportsmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

34j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1980

Related Models

• Seiko 3831-530
• Seiko 4495-506
• Seiko 6348-929
• Seiko 5678-576
• Seiko 7172-440
• Seiko 7192-116
• Seiko 4458-641
• Seiko 5641-588
• Seiko 0726-480
• Seiko 7159-341
• Seiko 3864-754
• Seiko 4511-660