Seiko Cal. 5635 - 181

The 5635-181 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5635 caliber with 27j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-b49775c1a82f]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1966

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