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"Watch and Clock Escapements A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology"


Monograms are the fad of the time, and there's money for the jeweler in
Monogram engraving. The knowledge in this book can be turned into cash.
All the various styles of letters are illustrated.
Price, $1.00 (4s. 2d.)
PUBLISHED BY THE KEYSTONE,
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
THE KEYSTONE RECORD BOOK OF WATCH REPAIRS
This book is 9 x 11 inches, has 120 pages, and space for recording
sixteen hundred jobs in detail. It is made of linen ledger paper, bound
in cloth with leather back and corners.
Price, $1.00 (4s. 2d.), prepaid.
No other record book on the market is so complete, and all cost more.
PUBLISHED BY THE KEYSTONE,
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
THE KEYSTONE
BOOK OF GUARANTEES OF WATCH REPAIRS
This book contains two hundred printed guarantees, and is
handsomely bound.


Pages:
329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353