Francois - Coro tried to give their costume jewelry a "French" touch and Francois was chosen as the name for their higher end jewelry. The line was introduced in 1933. But the line only lasted until 1944 when it was replaced by Vendome as Coro's Couturier division.
Francois was one of the new designers at Coro in 1938.
FRANÇOIS is a seldom seen Coro mark. François is a line of Coro jewelry that began in 1938 and continued until at least 1961, possibly later. Although collectors often think of Vendome as Coro's couturier line, François was one Coro's earliest couturier lines along with Coro Craft. François jewels were sold only in the jewelry cases of the finest stores. This information is from Coro Jewelry: a Collector's Guide by Marcia "Sparkles" Brown.
This pin is 5 1/8" long x 3/4 " at it's widest point. The earrings 1 1/4" long by 5/8" wide.