Antique Edwardian c1910 Imitation Diamond Threaded Back Stud Earrings

c1910 Edwardian slightly rose gold filled /low karat gold stud earrings.  The earrings are most likely low karat around 7-8k.  They are made very well and feature buttercup mounting set with 3.70 mm diameter imitation diamonds.  The earrings front is 6.06 mm diameter. The buttercups sit off the ears 5.64 mm.  

Threaded posts with the original backs-so rare to find them complete.  In very good antique condition all original.