Its not a President, its a Princeton...
Thank you for the info will change it now.
I seen yours this case back is stamped L8 a year older than yours. Sweet watches i see you made the mistake i did at first calling it a president.
It was originally listed as an unknown back in November of 2010 and it took a couple of months to find the ad for it, it does have some of the traits of the early 50's President with the side fins and 21J movement.
I have the original band for it as shown in the ad, it needs a couple of link caps replaced if I can find a donor band.
I also have its twin in White Gold/Black dial that it will add to the database one of these days.
They are nice watches, and I really like the style of the dial on the Yellow Gold version like yours.