D'Agostino guitars was a brand owned and distributed by PMS Music Inc of White Plains, New York. D'Agostino guitars were made from around 1977 to 1992, intially in Italy and Japan and from 1984 onwards in Korea.

Source: D'Agostino Benchmark catalog 1977

Source: reddit/r/DagostinoGuitars (9 February 2017)