Seiko Cal. 5660 - 421

This Spring Drive model from 1977 features a 45mm Hardlex-Coated Steel case. Powered by the 5660 caliber with 35j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-6ae0ce577571]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1977

Related Models

• Seiko 0735-156
• Seiko 6237-993
• Seiko 7082-111
• Seiko 6192-165
• Seiko 5624-324
• Seiko 3889-621
• Seiko 6150-864
• Seiko 7175-968
• Seiko 6657-396
• Seiko 6172-951
• Seiko 6615-222
• Seiko 6659-704