These are Japanese Centavo notes issued during the occupation of the Philippines. As far as I can tell they are authentic but they aren't officially authenticated or graded. Some of the notes are dirty but are otherwise in decent condition. There are 64 notes in total.
Block Letter codes and number of notes as follows:PK (1) - 1P|BG (1) - 4PM (5) - 42PG (5) - 10PL (5) - 1PS (5) -1PS (10) - 1PQ (10) - 1PR (10) - 2P|A1 (10) - 1