Seiko Cal. 3873 - 634

The 3873-634 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3873 caliber with 35j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-685c84c8a120]

Also known as: UFO, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1979

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