It is known that they were in business and marking jewelry with the Florenza brand beginning in the early 1950s until the company closed in February of 1981.
The author is attempting to date pieces of this jewelry to specific decades.
The pieces that were copyrighted by the company were marked with “COPR” (an abbreviation of copyright, used in place of the better-known ©) and also the year as shown in the examples here.
Since Hollycraft was not a huge manufacturer like Coro or Trifari, and had a more defined style, this information is not of great use in identifying general styles of the decade.
Combining this information and specifics mentioned in these books, the author is dating this Florenza set to circa early 1960s.
Beginning in the 1930s up to the mid-to-late 1950s, Trifari and Coro patented hundreds of costume jewelry designs.Mary Ann is an expert on Selro jewelry, and also Florenza jewelry and the history of Dan Kasoff Inc.She has presented on vintage jewelry topics in several venues, including CJCI Annual Convention, Bead Society of Greater Chicago, Chicago Botanic Garden, and 2007 VFCJ Vintage Jewelry Cruise.Here is one example: Frank De Lizza’s book provides great detail about the items the company was manufacturing, with each chapter devoted to a specific time period of just a few years.After summarizing this information in list form, one can note that large navettes and ovals, and givre stones were popular during the years 1957 through 1963.