The documented jewel count
Jewels and calibre data
The official ETA 2824-2 technical communication specifies 25 jewels. This figure applies to that calibre; it does not establish their exact allocation among movement components. ETA — 2824-2 technical communication.
Do not use this count alone to rank quality or to compare mechanical and quartz movements without further documentation. The ETA sheet provides an identified example, not a general rule about quality, materials or resale value. ETA — 2824-2 technical communication.
Frequently asked questions
Do watch jewels add resale value?
The number alone does not establish resale value.
Does a quartz watch have jewels?
It depends on construction; reviewed sources do not support a general rule.
Can a jewel break?
The reviewed sources do not document this risk; a watchmaker can inspect the movement.