Seiko Cal. 7139 - 728

The Seiko 7139-728 represents an important milestone in Seiko's 1974 lineup. It features a Navy dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-14784db276d8]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1974

Related Models

• Seiko 4457-652
• Seiko 6180-415
• Seiko 6651-212
• Seiko 4440-640
• Seiko 4465-301
• Seiko 6281-507
• Seiko 0742-755
• Seiko 6212-793
• Seiko 6647-660
• Seiko 6313-644
• Seiko 7178-667
• Seiko 5288-678