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Become an expert watch maker and earn $25.00 to $65.00 per week, lesson no. 6

GIA library holdings: volume 2, 3, 4, 6 Volume 2: https://archive.org/details/WatchMakerRogersv2 Volume 3: https://archive.org/details/WatchMakerRogersv3 Volume 4: https://archive.org/details/WatchMakerRogersv4

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