These rare composite wedjats are a representation of the eye of Horus damaged by Seth, recovered by Thot (the baboon) and making happy Sekhmet (the lioness on the top). The uraeus and the crocodile on the MET example are connected to stories involving the eye of the sun god Re. These amulets are of the Late Period only1,2
Green/blue/yellow/orange glaze W 3.7 Late Period-Ptolemaic Period Dynasty 26-30 MET #23.6.48
Faded pale green glaze with an identical row of three wedjats on the back H 4.2, W 3.7, T 0.6 Late Period Private collection DA
References
1Petrie W M F. Amulets, 1914, pp. 33-34 and Figs. 141g,j,k wrongly dated
2Page-Gasser M & Wiese A B. Egypte moments d’éternité, Verlag Philipp von Zabern, Mainz, 1997, pp. 298-299, n° 205