Here we have a Italian Vetterli M1870/87/15 Infantry Rifle made in Torino Converted to 6.5mm - Dated 1889. 

During World War I, many M1870/87 rifles were converted to share the same 6.5mm smokeless powder round as the primary service rifle, the Carcano, by adding a 6.5mm barrel lining and a modified M91 Carcano magazine. The barrel sleeving was called the "Salerno method"; The bolt face was also machined to accept the smaller diameter 6.5 mm cartridge head, and the firing pin shortened. These conversions were used for rear echelon troops (guards, training, etc.) and were rarely, if at all, fired with standard 6.5 mm military ball ammunition. After WWI, many of these rifles were assigned to the colonies of Tripolitania, Fezzan and Cyrenaica (Libya) and also to Eritrea and Somalia, again, as rarely-fired training rifles. These rifles were used again in the Second Italo-Ethiopian War, mostly by native African soldiers.