There are also double bull amulets with a full suspension loop nestling on their backs1. They also seem to link their owner with the daily travel of the sun disc1. Most are in faience and date to Dynasty 26 onwards
Blue glazed with sun disc overhead L 3.3, H 1.9, W 0.8 Late Period © 2014 Musée du Louvre/ Christian Décamps #AF 13553
Unusual carnelian example with sun disc over horns L 2.4, H 1.9, W 0.8 Late Period Private collection DA
References
1Andrews C. Amulets of Ancient Egypt, 1994, p. 90 and Fig. 91b
2Petrie W M F. Amulets, 1914, p. 45 and Figs. 223a-c