A few additional photographs of the Columbia Graphophone Type AB, most commonly referred to as the Macdonald. Thomas Macdonald was Columbia's factory manager and chief engineer, and held a number of significant patents. This open works machine with interchangeable two and five inch mandrels is clearly modelled after the Columbia Q and Columbia Eagle. Although many Columbia machines had a model designation stamped on the left of the chassis this Macdonald carries no . The speed control is marked in gradations, unusual for a Graphophone. This machine is stamped with a six digit serial number on the right front bedplate, but it is impossible that Columbia manufactured that many examples. Judging from the number I have seen, production would have been at most in the low thousands, and possibly significantly less than that.
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