Seiko Cal. 6661 - 798

The Seiko 6661-798 represents an important milestone in Seiko's 1969 lineup. Powered by the 6661 caliber with 26j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-fa423dd30ffe]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1969

Related Models

• Seiko 0755-728
• Seiko 6398-911
• Seiko 3833-264
• Seiko 5253-811
• Seiko 6313-515
• Seiko 6670-724
• Seiko 3826-625
• Seiko 6186-583
• Seiko 0717-978
• Seiko 6389-259
• Seiko 3851-348
• Seiko 6195-741