Dating Antique Clocks can be an exact science providing you have the right reference books and the proper experience. A few simple things that can point you in the right direction and at the correct period for your antique wall clock, advertising clock or bracket clock. Even the type of material used to construct your antique clock movement can help, or discovering when chimes were introduced and the type of chime used. It provided a safe alternative to the hazardous use of mercury in gilding metals, which was banned c The first American patent issued for a calendar movement was in
How to Date Old Photos - Daguerreotype, Cabinet Card, Tintype - Geneal
Southworth has been using date codes on most of our watermarked grades since at least The reason for the date code is so that Southworth can tell what year the paper was made. Southworth has received numerous calls asking if we can determine when a particular sheet of our paper was made. On approximately half of the calls we receive, we identify that the paper was made after the document states it was written. One of the calls that Southworth received was from Mr. Marvin H.
Yes, with certain limitations. We can determine the first date of commercial availability of the ink used to prepare any handwritten or handprinted material. The type of ink does not preclude this examination. If the initial date of commercial availability is more recent than the supposed date of the examined writing, then the document is not what it purports. We cannot, however, through this technique, determine the specific or even approximate date of preparation.