This is a vintage pocket watch by Oris.  It is gold plated with a black bezel design and a gold dial.  It is made in Switzerland.

The watch is strung on a vintage gold tone chain and worn as a pendant.  The chain is approximately 72 cm in length and has a spring ring clasp.  The watch is approximately 3 cm in diameter.

The watch is secondhand in good condition, although it is untested and unknown if this works.