Original WW2 Military Documents for sale



The Ott Differential Analyser

BIOS Intelligence Report. Final No. 412. HMSO [and] British Intelligence Objectives Sub-Committee (BIOS). 1946.

** A report by British Intelligence officers on an advanced differential analyzer under development and construction by the German firm of A. Ott of Kempten, Bavaria.

Duplicated typewritten report in English, 10 x 7.5 inches, 25 x 19 cms. 6 pages, 4 photographs, 2 sketches.

Very good in original stapled card wrappers.

The Ott company produced mechanical computing instruments of very high quality including part of the control mechanism for V2 rockets and was at the forefront of developmental and experimental work in the general area of applied mathematics.

The differential analyzer, although incomplete at this stage, held sufficient potential to merit close and detailed examination.


£125 including UK postage and insurance (enquire for overseas delivery)

Retirement sale

I'm selling this because of my retirement. If you're interested in purchasing it, please first contact me by email simply to check it's still available and has not been purchased elsewhere.

Your email should contain the title of the item (in red at the top of this page) and its price; your approximate location or full postal address, and confirmation of your interest.

I'll reply as soon as I receive your email (which may not be immediately, depending on where I am) to make appropriate arrangements with you for supply and payment by credit or debit card through my secure server or by direct payment to bank, whichever you prefer. Tell me which.


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