Don't read to much in the amount of jewels in a movement,in the jewel war in the 60s-70s.There were watches boasting up to 100 jewels,but most of them then
was purely for decoration,and a sales gimmick.Like the rest have said Jewels
are just like bearings in a car,to cut down the friction and wear.Normally a
manual wind will have less jewels than a auto.My old Unicorn from 1922 has
only 15 jewels but still beating strong.And as for the ETA movements they are
fine movements, and are in many a high end watch, sometime slightly modified
sometimes not.You will find the ETA 2824-2 in watches from £150 to well over £1000.Tyler you could try a find a old cheap mechanical watch at a flee market or bootsale,for you to take apart and explore the workings of a mechanical watch.
