Seiko Cal. 6684 - 987

Released in 1980, the Cal. 6684 with design code 987 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-0b49a341fc34]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1980

Related Models

• Seiko 0782-747
• Seiko 6230-540
• Seiko 6214-503
• Seiko 6177-752
• Seiko 7135-401
• Seiko 6283-485
• Seiko 7065-502
• Seiko 6139-546
• Seiko 6366-587
• Seiko 6137-882
• Seiko 3822-934
• Seiko 4551-560