Seiko Cal. 6320 - 136

The 6320-136 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6320 caliber with 20j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-23542d5e5362]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1988

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