Seiko Cal. 6139 - 740

The 6139-740 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-b76dcc03ccea]

Also known as: UFO, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1980

Related Models

• Seiko 0726-888
• Seiko 4542-387
• Seiko 5643-748
• Seiko 6684-308
• Seiko 7075-416
• Seiko 0782-950
• Seiko 3835-731
• Seiko 5639-222
• Seiko 7196-549
• Seiko 6324-757
• Seiko 0717-242
• Seiko 0718-373