Seiko Cal. 0770 - 557

This Spring Drive model from 1975 features a 45mm Two-Tone case. Powered by the 0770 caliber with 22j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-a2cd9334f679]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1975

Related Models

• Seiko 3862-578
• Seiko 3818-182
• Seiko 6130-843
• Seiko 7025-950
• Seiko 5637-269
• Seiko 5288-569
• Seiko 4554-848
• Seiko 0798-303
• Seiko 6673-756
• Seiko 7090-848
• Seiko 4417-785
• Seiko 4451-615