The Charlie Spivak Band Orchestrations consists of 29 boxes of original handwritten music scores and instrumental parts from 1940-1962. There are 103 complete scores with parts; 778 scores only and the remaining are incomplete sets. According to the catalog list, there are 171 missing scores.
The identified composers are Manny Abram (102), Sonny Burke (81), Nelson Riddle (70), Fred Norman (38), Neal Hefti (17), Sy Oliver (16), Billy VerPlanck (7), and Charlie Spivak (4).