Like most things, you get what you pay for.

 

Not so much now, but in years past I come across the mistaken notion that the jewels in a watch are somehow valuable like the jewels you may wear or treasure.

While I was sifting through the dead parts bins looking for something else I spotted this old piece out of a man's automatic wind watch from the 1960's.  The marketing departments of some of the less scrupulous companies would find ways to embed many more jewels than were necessary for the operation of the watch.  The rubis used in watches are synthetic bearings that have very little value outside of a watch wheel bearing.  Fun facts.

 

useless watch jewels

Here's another little cautionary tale.  This is the winding square from a small skeleton clock that was made in Korea.  The metal is too soft for the job and the key was too big, or the square too small to keep them secure while winding.  I can see some knuckles getting rapped on this one day.

Korean clock winding square

Shop carefully and don't be shy about asking questions of the professionals in your life, or path.