Red enamel on yellow metal(10K gold?)hoop clip on earrings,vintage, excellent

Fantastic pair of red enamel on gold hoop clip on earrings in excellent condition.Brilliant apple red color makes any ensemble pop. Small in size (see photos for measurements), they are just the touch needed. Very versatile, they look good with a variety of casual and office attire. Very comfortable; easy to wear all day. Hard to find these days, they are clip on, and fit securely. Great addition to any wardrobe.