Stickpin 'Horseshoe' with horse's head in diamond approx. 0.62 ct and brilliant-cut diamonds

Stick pin 'Horse shoe' with brilliant-cut diamonds totalling ca. 0.3 ct, ca. RW (F-G)/IF and horsehead-cut diamond ca. 0.62 ct, ca. RW (F-G)/SI, NP ca. 4,500 €, 18K yellow gold, 2.4 g, D: 11 mm, late 20th century, good condition, unknown maker's mark.