I don't own a7924 - have only ever seen pics.
Still, aspects of this eBay offering seems really odd to me.
Any owners out there care to comment ?
http://www.ebay.com/itm/1960-s-TUDOR-ROLEX-SUBMARINER-OYSTER-REF-7924-/350498467928?pt=Wristwatches&hash=item519b563058