Seiko Cal. 6620 - 746

The 6620-746 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6620 caliber with 24j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-4480c0554272]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

13.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1983

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