Cannone da 65/17 modello 13
The cannone da 65/17 modello 13 was an artillery piece developed by Italy for use with its mountain and infantry units. The designation means 65 mm calibre gun, barrel length 17 calibres, which entered service in 1913. The designation is often shortened to cannone da 65/17.
Additional Information: en.wikipedia.org/wiki/Cannone_da_65/17_modello_13