Watch chain and medallion with 11 old-cut diamonds

Watch chain and medallion with 11 old-european-cut diamonds totalling ca. 0.50 ct, ca. STW-TW (I-K)/P, set as a horseshoe and with engraved whip, medallion: ca. 2.1 x 2.1 cm, anchor chain, polished, 2 carabiners, 1 spring ring, L: ca. 52 cm, W: ca. 0.3 mm, 14K red gold/ yellow gold, total weight 26.8 g, mid-20th century, signs of wear.