The Fiat 6640A is an Italian wheeled amphibious armoured vehicle produced from the early 1950s to the 1980s for the Italian government.
The 6640A carries a crew of two, protected by thick armour, and is powered by a six-cylinder diesel engine providing a top speed of on land and 11 km/h on water, with a range of 750 km on land and 60 km on water. The 6640A was later replaced with the 6640G, which has a more powerful engine and longer wheelbase.https://dev.armyrecognition.com/europe/Italie/vehicules_a_roues/Fiat_Type_6640/Fiat_Type_6640A_description-pictures_italy.htm
References
External links 6640G Manual: https://archive.wikiwix.com/cache/index2.php?url=http%3A%2F%2Fwww.primapartenza.com%2Fdidattica%2Ffiles%2Fautocarro-anfibio-fiat-6640-g-2t-4x4.pdf%2Findex.html#federation=archive.wikiwix.com&tab=url