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Portrait of H. R. Playtner

H. R. Playtner

Information on this author is scarce, but their work continues to inspire readers.

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An Analysis of the Lever Escapement

"An Analysis of the Lever Escapement" by H. R. Playtner is a scientific publication written in the early 20th century. The book serves as a comprehens...

By H. R. Playtner

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