Ovation Guitar #0039 Internal Research and Development Test Document

This is an internal Ovation research and development document for guitar number 0039, Model #1687-8, Serial Number 0039-98, dated between April and September 1976. The first page contains detailed construction specifications including top angle, bracing measurements, bridge dimensions, and deflection/resonance data recorded across multiple test sessions (#39, #39-2, #39-1). The second page is a frequency response graph (spectrum analysis) recorded approximately 9/10/76, showing the acoustic output of the guitar measured in decibels across a frequency range from 30 Hz to 9397.2 Hz.