Original sentence: The Western Electric Model 500 telephone was the standard desk-style telephone set used by AT&T (the Bell System) in North America from the late 1949 through the divestiture of AT&T in 1984
Edited sentence: The Western Electric Model 500 telephone was the standard desk-style telephone set used by AT&T (the Bell System) in North America from late 1949 through the divestiture of AT&T in 1984