Seiko Cal. 4487 - 277

The 4487-277 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4487 caliber with 19j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-324f1a4303aa]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1983

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