Tune Out of Time
Philip E. High was a prolific author, although not well known in the states. This story,
first published when he was 89, tells the tale of the miraculous Mottram’s organ, which
unexpectedly sends Alan Stapleton to the past (or is it the future?) on an obscure
fragment of matter called Earth—and he may find himself in several other locations
before he finds his way home.
I deduce that this device was locked on the past—who’s past, yours or ours? Time is
relative, our future could be in your past or vice versa.