I have handled at least a dozen EF45 1851-O and 1852-O double eagles (combined) in the past year and I'd have to say that this example may be the most attractive, at least from the standpoint of originality. The obverse and reverse show lovely deep original green-gold color with no lightened areas from prior dippings or cleanings. The surfaces are remarkably choice for a New Orleans double eagle of any date with a near-total lack of marks. My guess is that this coin was recently found overseas but it doesn't have the too dark/too splotchy color that many of the O mints that are found in these sources display. The "+" designation from NGC was certainly the result of this coin's great eye appeal and I think a collector would be hard-pressed to find a nice New Orleans double eagle of any date for less than $5,000.