" Containing hundreds of private receipts and formulas compiled from the best and most reliable sources. Complete directions for using all the latest tools, attachments and devices for watchmakers and jewelers. "

Includes a nice bibliographic section on Horological Books and a small section on hall marks. Book contains detailed illustrations of watch making and jeweler tools. Listed in dictionary format, this work gives you an inside view of how antique jewelry and watches were made and repaired. If you work on vintage watches, clocks or jewelry you should definately have this book in your reference library.
 
This is an alphabetical listing of definitions and details of countless items, formulas, tools and equipment, escapements, setting and winding systems as well as of famous personages. Its contents contain formulas not included in today’s books. The fine engravings and explanations of older tools makes it a valuable reference for collectors, researchers and those who restore older timepieces.
 
One of the many charts gives the number of turns of which a spring is capable of developing, both theoretical and “real”.  It compares the number of coils the spring makes in the barrel when run down with measurements, given in millimeters and its fractions, compared to the diameter of the barrel, its arbor and space occupied by the spring when run down.  It supplies the proper lengths and thickness of these springs in barrels measuring from ten millimeters up to sixty millimeters in diameter. There are many other tables, pendulums, wheels, pinions, solders, hallmarks, wire gauges and more. There are numerous tables of alloys and their compositions and uses.  Screw gauge measurements, chemicals, their composition and their uses. All supported with line drawings or engravings.