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Pneumatic City Mail Hamburg Germany The Pneumatic City Mail in Hamburg was first used at 24 October 1864. In the 1960s is was replaced by the "Großrohrpost". 24-07-2018   01-08-2018
Hamburger Großrohrpost Patents The German pneumatic tube manufacturer C. Aug. Schmidt & Söhne from Hamburg recorded patents on parts used in the Hamburger Großrohrpost. I have several of these patents in my collection. 24-12-2013   23-07-2018 Books, Die Hamburger Großrohrpost The Hamburger Pneumatic City Mail with large diameter tube. 09-03-2013   06-08-2018
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