Seiko Cal. 4420 - 903

This Hand-Winding model from 1978 features a 44mm PVD Black case. With its 22mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-551fcfd405bf]

Also known as: UFO, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1978

Related Models

• Seiko 6682-755
• Seiko 0715-696
• Seiko 7087-421
• Seiko 5654-359
• Seiko 7082-398
• Seiko 6697-284
• Seiko 6633-915
• Seiko 6643-212
• Seiko 6280-489
• Seiko 5688-908
• Seiko 5685-559
• Seiko 5298-596