Seiko Cal. 0770 - 639

This Quartz model from 1981 features a 36mm PVD Black case. Powered by the 0770 caliber with 21j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-dbf7b0285e39]

Also known as: Bellmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1981

Related Models

• Seiko 4518-253
• Seiko 0767-398
• Seiko 6220-985
• Seiko 4458-237
• Seiko 7193-334
• Seiko 5672-678
• Seiko 7176-437
• Seiko 6189-373
• Seiko 6631-383
• Seiko 6163-702
• Seiko 6244-597
• Seiko 6174-166