Hahaha, I'll call this one out; look closely at the fade out and you can see the fingers change position around a circular object.
http://beckerexhibits.wustl.edu/did/20thcent/index.htm
I put my money on the; Siemens Halske Wallet and Purse hearing aid
How pathetic. But yeah I'll go with the time traveller with intergalactic mobile phone.
