Bronxville, NY: The Horolovar Company, 1972. Sixth edition. Original Decorated Tan Cloth. Octavo, pp. 176, first published in 1965. Gives the answer to every question about 400-day clocks which will ever face a repairman. Explains the escapement action in simple, understandable language, using clearly and carefully detailed illustrations. Very Good. No DJ. Item #1873
An important study for clockmakers and professional repair people. A scarce title today.