Seiko Cal. 4439 - 997

The Seiko 4439-997 represents an important milestone in Seiko's 1979 lineup. Powered by the 4439 caliber with 21j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-bf8cc5f5ce44]

Also known as: Rally, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1979

Related Models

• Seiko 4466-705
• Seiko 6294-789
• Seiko 6228-545
• Seiko 6373-796
• Seiko 4471-497
• Seiko 4443-749
• Seiko 6177-623
• Seiko 6258-113
• Seiko 4456-858
• Seiko 0788-362
• Seiko 5297-999
• Seiko 6131-974