This Eterna Sonic keeps good time and the date mechanism works correctly. The watch looks very good for its age with just a few marks, and has just had a new battery and leather strap fitted. The dial and hands are in a specially nice condition considering the watch dates to the 70s. The crystal has the original Eterna symbol in the middle and is overall in good condition with only a few light marks when viewed very close-up (see photographs). The watch also has the original crown with Eterna logo and a screw-in back that just has a few marks from being removed. The watch uses the classic 9162 tuning fork movement as used in the Omega f300 series. This would make a great addition to a collection or even as nice dress watch. I've good feedback and if you have any questions please don't hesitate to contact me. Many Thanks for looking - Kevin. The item "Eterna Sonic Tuning Fork Watch 9162/f300" is in sale since Sunday, August 4, 2019. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Wristwatches". The seller is "kevin*h" and is located in Bolton.