Hi Antonio,
I'm taking another look...
In the mean time - the definitive
work on Third Intermediate Period
shabti is the published dissertation:
de Arajo, Luis Manuel. Estatuettes Funeraries Egipcias de
XXI Dinasta. Lisbon, 2003.
ISBN: 9-782951-209206. I do not have access to this book; in fact, I doubt if there is a copy of it in the
United States. I saw
part of it online. The text is in Portuguese.
I'll send you a drawing of what I see on your
shabti later.
Russ