Seiko Cal. 3850 - 638

The 3850-638 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3850 caliber with 30j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-52b714663c27]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

30j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1977

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