Seiko Cal. 6620 - 540

The 6620-540 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6620 caliber with 19j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-003c9978afa6]

Also known as: Monster, Pogue

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1991

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