Seiko Cal. 6639 - 616

This Automatic model from 1973 features a 46mm Titanium case. Powered by the 6639 caliber with 23j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-681649c8389b]

Also known as: Monster, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1973

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