Seiko Cal. 6640 - 677

This Solar model from 1991 features a 36mm Hardlex-Coated Steel case. With its 22mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-9cead4bf79b9]

Also known as: Goldfeather, Bellmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1991

Related Models

• Seiko 4518-231
• Seiko 5286-339
• Seiko 0717-993
• Seiko 6189-287
• Seiko 7035-139
• Seiko 6196-446
• Seiko 4548-979
• Seiko 6245-216
• Seiko 7143-710
• Seiko 3836-337
• Seiko 5238-339
• Seiko 5294-446