The name Trifari as trademark is marked on every piece of their jewelry since 1937. Alfred Philippe joined the team in 1930 and quickly become the head designer. The crown over the T was used in the later 1930’s through the early 1970’s and the copyright symbol was used on their pieces since 1955. Pieces marked Trifari TM are the more recent Trifari pieces, from the 1980’s through the late 1990’s and are the end of the pieces signed by Trifari.
