A practical and theoretical treatise on the detached lever escapement for watches and time pieces This book, "A practical and theoretical treatise on the detached lever escapement for watches and time pieces", by Moritz Grossmann, is a replication of a book originally published before 1884. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.