This small horseshoe charm has a mark, but it's not one I recognize. I tested it though , and it is 9 ct gold. I'm not sure of the age of it either , so I'm calling it Vintage. It measures 5/8 of an inch North to South, and it weighs 1.28 grams.
Item ID:2528Gender: Unisex, Age Group: Adult, Color: gold, Size: 5/8 of an inch long