During WW2, the wire spool backpack (Rückentrage) was worn by German soldiers on the back to dispense wire, and on the chest to take up wire. There were two types: rigid frame and folding. The rigid frame backpack is shown below…
Check out my new book on WW2 German Field Telephone Equipment… https://www.lulu.com/en/us/shop/rotwang-manteuffel/world-war-2-german-field-telephone-equipment-a-basic-guide-for-reenactors-and-historians/paperback/product-976w9q.html?fbclid=IwAR04YSranv2-ldFa94Gx1lT3jxJv5YUzuiOzdqvveWJo_r03xxV77owThsQ&page=1&pageSize=4
WW2 German Field Telephone Equipment 