Seiko Cal. 6639 - 717

The Seiko 6639-717 represents an important milestone in Seiko's 1993 lineup. Powered by the 6639 caliber with 27j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-3cce272c5d23]

Also known as: Rally, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1993

Related Models

• Seiko 6351-386
• Seiko 5275-353
• Seiko 3857-348
• Seiko 6266-488
• Seiko 6165-365
• Seiko 6347-911
• Seiko 5662-588
• Seiko 7041-423
• Seiko 6174-159
• Seiko 4420-128
• Seiko 4514-746
• Seiko 0761-605