Seiko Cal. 6635 - 155

The 6635-155 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6635 caliber with 25j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-0ca5ed3f9850]

Also known as: Bellmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1989

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