Seiko Cal. 6397 - 781

The Seiko 6397-781 represents an important milestone in Seiko's 1968 lineup. Powered by the 6397 caliber with 24j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-455d4cf18b25]

Also known as: UFO, Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1968

Related Models

• Seiko 6153-109
• Seiko 7020-203
• Seiko 5623-987
• Seiko 6651-349
• Seiko 6322-258
• Seiko 5699-238
• Seiko 6130-270
• Seiko 4412-789
• Seiko 0796-412
• Seiko 6619-190
• Seiko 7141-799
• Seiko 0739-746