This one was owned by a retired Colonel in the United States Army, his serial number was engraved in the backplate by the nursung staff in the veterans hospital (theft prevention). It has a caliber 350 movement.... Just like is found in the Omega Constellation & Seamaster models.
The watch winds itself from the movement of your arms tiny weight inside swings around.... The self winder works well.... Sounds like a tight fishing reel - no scraping or rattling. This is a feature found on many high end watches like a Rolex Date just or Patek Philippe. I have been observing this watch, and it keeps good time with my computer clock.
The item "1960's LONGINES AUTOMATIC Cal. 350 MANS VINTAGE WATCH Flip-Lock band KEEPS TIME" is in sale since Sunday, October 11, 2015. This item is in the category "Jewelry & Watches\Watches\Wristwatches". The seller is "emilyseth" and is located in Pittsburgh, Pennsylvania. This item can be shipped worldwide.