after being restored by aaron cramer, lambert's talking clock is currently at the national watch and clock museum in columbia, pa, and is listed in "the guinness book of world records" and in "the encyclopedia of recorded sound" as the world's oldest playable recording. until 2008 it was considered to be the oldest surviving sound recording but a phonautogram of au clair de la lune by édouard-léon scott de martinville from 1860 has been found to pre-date it. however, lambert's recording is still the oldest which can be played with its own original device, unlike the phonautogram which was played by optically scanning it and using a computer to process the scan into a digital audio file.