WW2 classified intelligence reports which few collectors know exist
Outstandingly rare WW2 Secret, Restricted or Confidential British and US (CIOS or BIOS) military intelligence reports.
Each issued copy of each report has its own additional unique 'Copy No. ??? security number for selected distribution within the British and US intelligence community by Allied military intelligence at the end of the second world war.
Very few of these uniquely-numbered classified documents have survived. Few collectors know they exist; only a tiny handful actually owns one.