I took a wood toothpick and moved a little collected gunk from around the solder point to discover a date of 1855 (the last "5" is visible)... Only 1,346 of this date were minted in the "5 Francs Napoleon III" gold coins...(KM# 787.1, GAD# 1001, F# 501, N# 7167). A jeweler of the day no doubt took these two small gold coins (1855 & 1860) and hand crafted them into a one-of-a-kind pair of earrings amazing to still have both together after all these years!
Both are genuine original gold coins (NOT fakes, NOT tokens) with the obverse displaying the art work of a fancy script initial "A"... Earrings together weigh about 3.9 grams (about 2.4 dwt) and according to my reference material the coins are about 90% pure gold or around 21K (reverse reads, "Empire Francias"). On the back of one gold coin you can see a distinct "5" and on the back of the other you can see the date ending in a distinct "0"...(from the date range that these specific coins were produced, that would make one 1855 and the other 1860 as they were produced from 1855 to 1860 in this particular style). As is the coins measure about 16.2 - 16.3 mm and are about. "For God so loved the world that He gave his one and only Son, that whoever believes in him, shall not perish but have eternal life".