SHOWCASE 9. CELL 9-20

Communications Equipment of WW I

iSTR (Streckenfernsprecher 15) - Miners telephone, model 1907, used by German Imperial Army communications troops at the beginning of WW I when constructing permanent wire lines.
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Portable telephone of this type was listed in "Taschenhandbuch für Feldtelegrafisten" issued in 1917 for German Imperial army communications troops. Such portable telephones were produced in Germany up to late 1930s. Our sample has a capacitor inside marked "3.39".

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