a machine made of metal
a synchronous clock made of metal
a clock made of metal
a metal clock on table
a clock with  no numbers
a clock with silver arms
a clock on a table
a clock on a black table
tables with black table cloth
a tall metal clock
a clock made out of metal
a black table cloth
This is a clock.
the clock is made of metal.
the clock is red and blue.
This could be at a science fair.
large mechanism with multiple hinges
A metal clock
a red and blue machine on top of a table