** An outstandingly rare WW2 Secret military intelligence report, every distributed copy with its own unique security number, this being 'Copy No. 110'.
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 secret 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 SECRET report Copy No 110 The Horten Tailless Aircraft
CIOS Intelligence Report. XXIII-6. Combined [British/US] Intelligence Objectives Sub-Committee (CIOS). May 1945.
** The exceedingly rare Secret version of the major CIOS report on the Horten aircraft.
CIOS 'Black List of targets for urgent investigation' category: Aircraft
Duplicated typewritten report in English, 10 x 7.5 inches, 25 x 19 cms. 54 pages including 16 photographs and 18 illustrations, some folding.
Very good in original stapled card wrappers. Protected in a modern clear archival jacket.
The magnificent rarely found early work of figures, plans and photographs of tailless aircraft (flying wings) under development by the Horten brothers, Major Walter Horten and Oberleutenant Riemar Horten of the Luftwaffe, aircraft designers.
The report, File XXIII-6, by D.C. Appleyard and M.A. Biot, is the larger and more important of the two reports on the Horten aircraft issued by CIOS at about the same time, the other being File XIX-2 by M.A. Biot and J.M Jayne.
A lovely provenance having the 'Withdrawn' stamp of the Royal Aircraft Establishment, Farnborough on the front cover. The original classification word 'SECRET' has been scored through in ink on most pages by a later owner.