Sekhmet-Mut is a syncretization of both goddesses with Sekhmet wearing the Mut crown. Such rare amulets are of the Third Intermediate Period1

Sekhmet-Mut - Gold 5.3, W 1.0, D 1.5
Sekhmet-Mut - Gold 5.3, W 1.0, D 1.5

Gold 5.3, W 1.0, D 1.5
Dynasty 22
© 2003 Musée du Louvre/
Georges Poncet #E 22812

Sekhmet-Mut - Blue glaze enthroned
Sekhmet-Mut - Blue glaze enthroned
Sekhmet-Mut - Blue glaze enthroned

Blue glaze enthroned
H 7.0, W 1.7, D 2.5
Third Intermediate
Period
Museo Egizio #300

Sekhmet-Mut - Blue glaze H 10.6

Blue glaze H 10.6
Dynasty 22
Bonhams Antiquities
lot 29, 7 July 2022

Reference

1Andrews C. Amulets of Ancient Egypt, 1994, p. 23