Keywords: Uhrenquarze-P1010636.JPG Uhrenquarze in 2 Armbanduhren Two quartz watches with their case backs removed showing works The arrows point to the quartz crystal resonator units which keep time for the watches own original text eigenes Foto 1 2010-09-11 Elcap Jens Both siehe unten Elcap de Original upload log de wikipedia Wdwd CommonsHelper page de wikipedia Uhrenquarze-P1010636 JPG 2010-09-11 14 13 Elcap 1388×950× 181306 bytes <nowiki> Andere Versionen </nowiki> Crystal oscillators Quartz Wristwatches |