Ospedale PG 203 Castel San Pietro, Bologna

The hospital at Castel San Pietro, established in a large school building, came under the territorial jurisdiction of Bologna, Italian region of Emilia-Romagna in northern Italy. The prisoner of war hospital was in operation from September 1942. International prisoners as at 31st December 1942: 33 officers and 495 troops. As at 31st March 1943:  6 officers and 61 troops.

PM 3200

Some information here (pages 224 to 227): https://nzetc.victoria.ac.nz/tm/scholarly/tei-WH2Pris-_N84741.html#name-034798-mention

Note:

Ospedale PG (prigionieri di guerra) translates to “hospital for prisoners of war”.

According to Italian camp lists, all prisoner of war camps and hospitals were allocated an “agreed camp number”. The hospitals were not camps in the normal sense of the word. Some were civilian hospitals which were instructed to adapt a sector of the hospital for prisoners of war. These instructions, issued by the Royal Army General Staff, Prisoner of War Office, were part of the general criteria for the organisation of all hospitals for prisoners of war in Italy. Hospital facilities throughout Italy were also known to be located in other establishments such as a monastery, convent and almshouse.

PM abbreviation
Camps in Italy were divided into postal areas, each area designated ‘PM [number]’. PM translates to ‘Posta Militare’, meaning ‘military mail’. The number indicated the central postal reception area for the camps’ mail.