No quedan existencias de este artículo.

M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition by W...

Great Book Prices Store
(363473)
Vendedor profesional
Registrado como vendedor profesional
Otros artículos del vendedor
Contactar con el vendedor
USD22,50
Aproximadamente19,40 EUR
Estado:
Como nuevo
Envío:
Gratis USPS Media MailTM.
Ubicado en: Jessup, Maryland, Estados Unidos
Entrega:
Entrega prevista entre el jue. 11 dic. y el mié. 17 dic. a 94104
Las fechas previstas de entrega (se abre en una nueva ventana o pestaña) incluyen el tiempo de manipulación del vendedor, el código postal de origen, el código postal de destino y la hora de aceptación, y dependen del servicio de envío seleccionado y de que el pago se haya hecho efectivoel pago se haya hecho efectivo (se abre en una nueva ventana o pestaña). Los plazos de entrega pueden variar, especialmente en épocas de mucha actividad.
Devoluciones:
14 días para devoluciones. El comprador paga el envío de la devolución..
Pagos:
    Diners Club

Compra con confianza

Garantía al cliente de eBay
Si no recibes el artículo que has pedido, te devolvemos el dinero. Más informaciónGarantía al cliente de eBay - se abre en una nueva ventana o pestaña
El vendedor asume toda la responsabilidad de este anuncio.
N.º de artículo de eBay:388275330066
Última actualización el 21 jul 2025 14:45:43 H.EspVer todas las actualizacionesVer todas las actualizaciones

Características del artículo

Estado
Como nuevo: Libro en perfecto estado y poco leído. La tapa no tiene desperfectos y si procede, con ...
ISBN
9781937684693

Acerca de este producto

Product Identifiers

Publisher
Periscope Film, LLC
ISBN-10
1937684695
ISBN-13
9781937684693
eBay Product ID (ePID)
168590359

Product Key Features

Book Title
M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition
Number of Pages
92 Pages
Language
English
Topic
Military / World War II
Publication Year
2012
Genre
History
Author
War Department
Format
Trade Paperback

Dimensions

Item Height
0.2 in
Item Weight
3.5 Oz
Item Length
8 in
Item Width
5 in

Additional Product Features

Synopsis
Designed by Swedish cryptographer Boris Hagelin, the M-209 Converter was a portable, mechanical cipher machine. Used extensively during WWII and the Korean conflict by both the Army Signal Corps and the U.S. Navy (which designated it the CSP-1500), Hagelin's device allowed a rapid and secure means of communication. The lunchbox-sized machine was so simple that little training was required to use it, yet its cipher scheme proved very difficult - but not impossible - for the Germans to crack. The M-209's elegant design uses six adjustable key wheels or rotors to produce a reciprocal substitution - also known asa Beaufort cipher. The effect was that of sliding a normal alphabet sequence against the same sequence reversed, with a high degree of irregularity in the shifting process brought about by a train of gears. In the train of gears, the number of teeth on the driving number was also varied by the use of keying elements. Prepared by the War Department for the Signal Corps and other users, this M-209 technical manual was originally restricted, but is now considered declassified. It describes the operation and care of this fascinating device. This revised edition was originally printed in 1944 and contains severalsections not found in earlier versions, including maintenance and parts information. It provides a fascinating glimpse into mid-level encryption technology circa 1944.

Descripción del artículo del vendedor

Información de vendedor profesional

Certifico que todas mis actividades de venta cumplirán todas las leyes y reglamentos de la UE.

Acerca de este vendedor

Great Book Prices Store

98% de votos positivos•1,4 millones artículos vendidos

Se unió el feb 2017
Suele responder en 24 horas
Registrado como vendedor profesional
Visitar tiendaContactar

Valoraciones detalladas sobre el vendedor

Promedio durante los últimos 12 meses
Descripción precisa
4.9
Gastos de envío razonables
5.0
Rapidez de envío
5.0
Comunicación
4.9

Votos de vendedor (411.138)

Todas las valoracionesselected
Positivas
Neutras
Negativas
  • u***n (25)- Votos emitidos por el comprador.
    Mes pasado
    Compra verificada
    This unique book was priced quite reasonable. The book was advertised as new and arrived in mint condition and in the highest authentic hard cover quality. It Packaging was very good when mailed. I also find communicating with the seller during the shipping process, which was a bit of a wait for a very hard to find book, was very prompt and inspired trust. I highly recommend this seller and will return for future purchases.
    En verso y en prosa / In Verse and Prose : Antología, Real Academia Española ... (#389055486497)
  • e***r (2735)- Votos emitidos por el comprador.
    Últimos 6 meses
    Compra verificada
    AAA+++; Excellent Service; Great Pricing; Fast Delivery-Faster Than Expected to Chicago using free shipping USPS Media Mail, Received 06/18; book in Great Condition as Described ; TLC Packaging; Excellent Seller Communication, Sends updates . Highly Recommended!, Thank you very much!
    Elizabeth Catlett : A Black Revolutionary Artist and All That It Implies, Har... (#365566171808)
  • f***f (1670)- Votos emitidos por el comprador.
    Mes pasado
    Compra verificada
    Excellent Seller, Goes the Extra Mile. The Seller Was Incredibly Communicative. Smooth Transaction, Shipped Very Quickly, As Advertised; Good Price; Well Packaged & Delivered Within a Few Days. Item in Described Promised Condition, Thank You Very Much!!!!!!!!!!! A+
    Angels of Lockhart, Hardcover by Wiley, Thomas L., Like New Used, Free shippi... (#365764940876)
Ver todos los votos

Más que explorar: