Contro maggiore (m)
(with) definite article: illow drone, adjustable: conical, straight, bell, no cavity / double reed
From "contro" [counter-, as in countertenor] ?; Central Latium; It came into use in the late 1970s, early 1980s; If used, it replaces the Moschetta, taking its place (rear centre), or that of the Contro, which is then relocated to the rear centre, and has become, of course, the 2nd, high drone.
30 normale, according to Ricci: c (No measure given).
Ricci, Antonello: Musicisti e zampogne del Lazio meridionale. In: La zampogna: gli aerofoni a sacco in Italia (2005), I, p.135.