Seiko Cal. 6120 - 487

The 6120-487 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6120 caliber with 25j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-38bb447a6f6f]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1976

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