A watch or clock that measures time precisely

A chronometer is an exceptionally precise mechanical timepiece, designed to be accurate in all conditions of temperature, pressure, etc, especially one used at sea. Watches are sometimes distinguished from clocks in general, but really a watch is just a portable clock, usually worn in a pocket or on the wrist.

A watch is a clock that measures time precisely. If I had to choose it would be a watch.

Explanation:

hope this helps :))

because i have already answered your question several times, answering it again would be superfluous.

by elena

op: object of preposition