Seiko Cal. 6640 - 505

The 6640-505 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-32e03af2b79d]

Also known as: Pogue, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1992

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