** An outstandingly rare WW2 Restricted military intelligence report, every distributed copy with its own unique security number, this being 'Copy No 175'.
Very few examples of this classified and security-numbered report have survived. Because of the report's extreme rarity, few collectors know these documents exist; only a tiny handful actually owns one.
An 'ordinary' version of this restricted CIOS intelligence report was subsequently authorised for issue. The later version was given the same title but had the HMSO name as publisher on the front cover and lacked the security classification and unique identifying security numbering.
WW2 RESTRICTED report Copy No 175 Personnel Anti-bomb Shelters
CIOS Intelligence Report. XXVII-57. Combined [British/US] Intelligence Objectives Sub-Committee (CIOS). April 1945.
** RESTRICTED Copy no. 175 of the CIOS detailed description of two very large bomb shelters (Grossmarkthalle Bunker and Windeckstrasse Bunker) located in Bonn.
CIOS 'Black List of targets for urgent investigation' category: Building materials
Duplicated typewritten report in English, 10 x 7.5 inches, 25 x 19 cms. 16 pages (numbered 1-13) including 3 full page illustrations, plus two very large single-sided double page plans and sections.
Very good in original stapled card wrappers. Protected in a modern clear archival jacket.
The two shelters between them on occasion during heavy raids held 10/12,000 civilians although designed for around 2,000.
A lovely copy of a rarely found CIOS restricted report on a most unusual subject.