Seiko Cal. 6121 - 380

The 6121-380 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6121 caliber with 24j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-eb0413b3aa13]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1970

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