Prov. Hugh Stanley Russell collection, sold at Bonhams 2005.
Note the well defined tripartite wig and the detailed feet.
No exact parallels are known to me. However, a very similar overseer
for Isis-em-Akhbit is published in CAA Amsterdam, inv. 9471, page 122/123 clearly coming from the same mold, even the sizes match. Perhaps the SC shabti belongs to a close relative of the Amsterdam one.
The name appears in Cache 2, but is too common to attribute this shabti to Cache 2 without further clues.