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A loaded Blattnerphone reel weighed 15 kg, 1933 (CSTM; 1969.0727)
Source: Canada Science and Technology Museum/CSTM 1969.0727 Musée des sciences et de la technologie du Canada/MSTC 1969.0727
© Canada Science and Technology Museum. Reproduced with the permission of the Museum.
nlc-12406
Source: Canada Science and Technology Museum/CSTM 1969.0727 Musée des sciences et de la technologie du Canada/MSTC 1969.0727
© Canada Science and Technology Museum. Reproduced with the permission of the Museum.
nlc-12406
