Palimpsest

take a look at this, my boy.
what is it, herr doktor?
you need to first know what it is not!
huh?
obviously, it appears to be a fabricated industrial foundry mold, inexplicably wedded to an ordinary piece of automotive equipment.
it does?
which is exactly what it is not! the unknown designer cleverly concealed a sophisticated machine of enormous importance! a veritable palimpsest!
what?
my rigorous testing has revealed that this mysterious object holds the key to controlling the speed of light! and specifically, how to stop light in its tracks! ha ha!
gee.
these numbers contain the crucial code: "66861-0"
uh, doktor, I think the numbers are actually 66851-0.
what's that? mein gott! you're right!
is that important?
important? good thing I didn't pay for this worthless piece of junk.
you mean, no palimpsest?
no. but how about a vodka martini instead.
should I make it. . .
a double. very good, my boy.