It is manufactured, marketed, and distributed by Fabbrica d'Armi Pietro Beretta, in Gardone Val Trompia, Italy.
At some point, Beretta dropped the "S" from the front of the 682 model number, narrowed the receiver, introduced a new choke system, and reduced the barrel weight as well.
However, there is only a small chance that a new model 682 barrel with drop in place and work properly on an older wide frame S682.
One of the most common issues with simply dropping an unfitted barrel into a S682 is that the ejectors may not work / be times properly.
The primary reason given for the receiver design changes are generally thought to be related to weight savings for Olympic competition shotguns, such as the S682 and subsequent 682/686/687 models.