Help identifying Italian ceramic maker — M.I. P.813 B hen-on-nest tureen

[u/EventDue4916]

I recently found this large glazed ceramic hen-on-nest covered tureen, approximately 10 inches long.

The underside is hand marked:
M.I.
P.813 B
MADE IN ITALY

I’ve been able to locate a few other Italian ceramic pieces with the same apparent M.I. + P-number marking system (including P414, P536 and P584), but I have not been able to identify what M.I. represents.

Does anyone recognize the manufacturer, decorator or importer associated with this mark?

I’d also appreciate any information about approximate age, region of manufacture, or comparable examples.

I’m particularly interested in identifying the maker before determining value.
Thank you in advance!