Seiko Cal. 6620 - 535

The 6620-535 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6620 caliber with 32j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-000de3b66d49]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1979

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