Seiko Cal. 4445 - 390

The 4445-390 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-7fdc9afa0f57]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1967

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