author
Walter J. (Walter John) Kleinlein
b. 1876
A practical early 20th-century horology writer, he is best known for clear, workshop-focused books on watch adjustment and balance work. His writing speaks directly to watchmakers who wanted reliable methods they could use at the bench.
1 Audiobook
Rules and Practice for Adjusting Watches
by Walter J. (Walter John) Kleinlein
About the author
Born in 1876, Walter J. Kleinlein wrote technical books for watchmakers at a time when precision timekeeping depended on deep hands-on skill. His best-known work, Rules and Practice for Adjusting Watches (1920), was published for readers learning how to improve the accuracy of high-grade watches through careful adjustment.
He followed that with Practical Balance and Hair-spring Work (1925), another detailed manual centered on the delicate parts that most directly affect a watch's performance. In the preface to Rules and Practice for Adjusting Watches, he dated his work from Waltham, Massachusetts, a city closely linked with American watchmaking.
The surviving sources available here tell us much more about Kleinlein's books than about his personal life. What stands out is his reputation as a practical instructor: instead of writing in abstract terms, he focused on the exact problems working watchmakers faced every day.