This book was originally published in 1946, and it's still in print because it's the best. The text is straight forward, clear and easy to understand. The illustrations are very helpful, maybe even excessive, but to someone who knew nothing about the subject before starting the book, that's not so bad. The newer editions have a small section on quartz repair, but due to the advances in electronics, it is dated. The theory is helpful, but those seeking to learn quartz repair only probably need another book. All in all, it is a great book highly recommended to anyone who would like to learn watch repair.