All signs point to there being only one Angelo Musi in NBA history: Angelo Musi Jr. Here's what's interesting about him:

College Standout: Before the NBA, Musi was a star at Temple University. He captained both the baseball and basketball teams, even earning All-American honors in basketball during the 1941-42 season  [basketball-reference.com].

Champion Breeder:  Musi's professional career crossed over between two leagues – the American Basketball League (ABL) and the Basketball Association of America (BAA), the precursor to the NBA. He won championships in both leagues: the ABL in 1944 and the BAA in 1947 [Wikipedia].

Sharpshooter & Playmaker:  While stats from his era aren't as detailed, Angelo Musi had a reputation as a skilled long-range shooter and a talented playmaker who could set up his teammates [probasketballencyclopedia.com].