Seiko Cal. 6621 - 777

The 6621-777 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-ab81badd6837]

Also known as: Monster, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1979

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