Seiko Cal. 5270 - 643

The Seiko 5270-643 represents an important milestone in Seiko's 1966 lineup. Powered by the 5270 caliber with 30j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-577d46d6f7bf]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1966

Related Models

• Seiko 7183-932
• Seiko 3859-934
• Seiko 0739-104
• Seiko 4525-795
• Seiko 3853-145
• Seiko 6378-977
• Seiko 6671-868
• Seiko 4495-499
• Seiko 5654-633
• Seiko 6229-863
• Seiko 6318-612
• Seiko 7035-160