This is a 10KT white gold plated watch with an M4 date code. The 23J movement is a 5AR also with an M4 date code. Found a match in the 1965 Linebook showing this as a 1964 Bulova Nocturne "Q" which would be a first for the database. Came with an original GEMEX gold plated bracelet.
Movement Date Code
Case Serial No.