1866 - 20c on 15c light blue, Type I horseshoe ove

 1866 - 20c on 15c light blue, Type I horseshoe overprint with blue ‘XV’ dotted numeral cancellation, alongside the double-circle ‘POSTA MIL.RE ITAL.NA 11A DIVISIONE 3 AGO. 66’, also in blue, on the front of cover addressed to Castelnuovo Scrivia (23). Cover mentioned on p. 264 of the book 1866. La terza Guerra d'Indipendenza. La Posta Militare Italiana, study by Carra-Carraro, 5 recorded documents. Manzoni certificate