Seiko Cal. 4487 - 658

The 4487-658 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4487 caliber with 22j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-786d22182e8a]

Also known as: Tuna, Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1974

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