Seiko Cal. 6644 - 153

The 6644-153 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-2c965baa1bbf]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1970

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