Seiko Cal. 6387 - 742

The Seiko 6387-742 represents an important milestone in Seiko's 1979 lineup. Powered by the 6387 caliber with 34j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-8ba2fa8e20d9]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1979

Related Models

• Seiko 5247-463
• Seiko 0786-164
• Seiko 4560-691
• Seiko 7189-346
• Seiko 3843-840
• Seiko 5614-642
• Seiko 7082-569
• Seiko 4474-470
• Seiko 6618-619
• Seiko 4567-344
• Seiko 5226-244
• Seiko 5243-718