Seiko Cal. 5639 - 363

The 5639-363 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5639 caliber with 35j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-56f6c19ecec5]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1966

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