Many lion(ess)-, human-, and ram-headed uraei hybrid variants of the Late Period1 are mostly flat back in glass
Glass H 4.7-2.5 Ptolemaic Period
© 2004 Musée du Louvre/Christian Décamps, from left to right:
Red lioness-headed, base broken #E 2234, blue/grey lion-headed #AF 13183,
white and blue ram-headed #E 2239, and yellow ram-headed #E 2235
References
1Andrews C. Amulets of Ancient Egypt, 1994, p. 35 and Figs. 31d, 41c