The OTO design was known formally as "Bomba a Mano, OTO Modello 1935" signifying its intended role ("Hand Bomb"), manufacturer ("OTO") and year of issuance ("1935") to the Italian Army. Its shape was consistent with the others featuring a cylindrical body containing the TNT filling, fragmentation pellets and detonator. The body sported a flat base for seating and a rounded cap on top housing lead balls to be used for the requisite fragmentation effect. By and large, the OTO Model 1935 was highly similar to the Breda in both form and function save for its pointed black cap (as opposed to the Breda's flat, unfinished cap).
Of all the Italian hand grenades featured in World War 2, the Breda Model 1935 outlasted the rest, seeing service into the 1960s. By that time, a more conventional fragmentation shape was adopted.
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