Seiko Cal. 4478 - 903

The Seiko 4478-903 represents an important milestone in Seiko's 1976 lineup. Powered by the 4478 caliber with 31j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-dd617c999424]

Also known as: Pogue

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1976

Related Models

• Seiko 5648-341
• Seiko 6684-411
• Seiko 7016-882
• Seiko 3891-280
• Seiko 5653-952
• Seiko 7049-363
• Seiko 7185-751
• Seiko 6385-596
• Seiko 6647-580
• Seiko 3853-981
• Seiko 5298-480
• Seiko 6313-913