Seiko Cal. 4491 - 687

The Seiko 4491-687 represents an important milestone in Seiko's 1970 lineup. Powered by the 4491 caliber with 32j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-74fb1016b09d]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Champagne

Jewels

32j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

Related Models

• Seiko 6177-723
• Seiko 6240-296
• Seiko 6235-871
• Seiko 6644-794
• Seiko 6336-638
• Seiko 4440-403
• Seiko 6660-412
• Seiko 4587-652
• Seiko 5293-956
• Seiko 6672-953
• Seiko 6185-512
• Seiko 6668-901