CLOCK:
The sign for "clock" is a combination of the sign for "time" and using a
classifier to show the general size and shape of a clock. You can modify
the classifier to show different types of clocks. For example I generally
use "C" hands to show a typical desk clock. But if I'm referring specifically to
a clock up on the wall I generally use modified (rounded) "L" hands since wall
clocks tend to be much thinner than desk clocks. A "wall clock" is basically a
"dish" on the wall. So you would sign "TIME"+"dish on the wall" to mean wall
clock. :)

See: TIME