Seiko Cal. 6139 - 728

Released in 1966, the Cal. 6139 with design code 728 was part of Seiko's domestic market collection. Powered by the 6139 caliber with 26j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-47fd689db8ea]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

26j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1966

Related Models

• Seiko 6347-929
• Seiko 7061-545
• Seiko 5683-569
• Seiko 7168-760
• Seiko 6188-230
• Seiko 4452-256
• Seiko 6395-298
• Seiko 5655-617
• Seiko 7186-697
• Seiko 7194-825
• Seiko 5295-206
• Seiko 5632-524