Seiko Cal. 4450 - 721

The 4450-721 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-73751a36950d]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1965

Related Models

• Seiko 5243-727
• Seiko 6372-101
• Seiko 0725-710
• Seiko 6219-778
• Seiko 7060-183
• Seiko 6193-587
• Seiko 6337-494
• Seiko 6371-706
• Seiko 5625-493
• Seiko 4483-216
• Seiko 4596-499
• Seiko 5297-802