Seiko Cal. 6691 - 920

The Seiko 6691-920 represents an important milestone in Seiko's 1993 lineup. Powered by the 6691 caliber with 21j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-21c295a2cb77]

Also known as: Tuna, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1993

Related Models

• Seiko 7178-470
• Seiko 6671-566
• Seiko 4496-157
• Seiko 6161-634
• Seiko 4441-711
• Seiko 6150-286
• Seiko 7121-757
• Seiko 4513-863
• Seiko 7030-600
• Seiko 3887-532
• Seiko 6651-327
• Seiko 6642-759