Seiko Cal. 3870 - 537

The Seiko 3870-537 represents an important milestone in Seiko's 1992 lineup. Powered by the 3870 caliber with 23j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-a635e738ca12]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1992

Related Models

• Seiko 6364-887
• Seiko 7086-528
• Seiko 5294-873
• Seiko 6248-812
• Seiko 7191-994
• Seiko 4465-735
• Seiko 3852-965
• Seiko 6628-477
• Seiko 6145-108
• Seiko 7178-874
• Seiko 7052-790
• Seiko 7117-274