Seiko Cal. 6636 - 538

The 6636-538 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6636 caliber with 36j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-38661fd0bee1]

Also known as: Bellmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1975

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