Below are three unusual sphinxes on integral plinths of the Late Period1

Faded green glazed recumbent sphinx with head turned to its right
Approximate L 3.0 Late Period
Christie’s New York, Sale 1445 Ancient Jewelry, part of lot 80
9 December 2004

Red glazed sphinx holding a falcon, flat back L 3.5, H 2.0 Late Period
Museo Egizio #1419

White glass sphinx holding
a vase, flat back L 4.0, H 2.2, D 0.5
Ptolemaic Period © 2013 Musée du Louvre/Antiquités égyptiennes #E 2241

References

1None, Unpublished amulets