The "necessary know-how" part. I don't have a clue how to do all the scripty-php-java-whatsit that would be needed on the back end. (Notice that...
No...not that I'm entirely sure I'd notice if I had. I remember once running across someone who had a standing offer of like $100 for a note with...
The problem is that it looks for all sorts of kinds of mathematical uniqueness, some of which collectors don't typically care about (like whether...
If that's the kind of information you're looking for, then: The ultimate book in this direction is Chuck O'Donnell's Standard Handbook of Modern...
I'm confused by your "10 to the 5th" references. That'd be 100,000, which number I don't think I used anywhere.... To count the number of...
This is actually even easier--with radars there's no restriction that the digits have to be different, so you don't get factorials, just powers of...
Almost, but not quite. The standard print runs for star notes at the time were 20,000 sheets, or 640,000 notes. So Spock's note is from the tail...
Easy: the first half of the digits can be anything at all, and the second half then have to be an exact match (in reverse). So just count the...
The letters start over with each new series, so it's not often that a series runs long enough to get all the way up to X. The most recent times...
Also note the mismatched typefaces of the 'A' suffixes in the two serial numbers of the $20. The higher-crossbar 'A' that appears in the...
Everything was printed at the BEP in Washington. The notes were then issued to the banks in the form of six-note sheets. If you go back to the...
The second note in the picture is a bit special...it's a 1935G with motto star. The motto "In God We Trust" was added to the back of the $1 bill...
It's not a question of *when*; it depends on what type of currency you're looking at. When star notes were first introduced in 1910, the star...
That edition must've been published while the 2003 series was still in production, then.... The total printage for the San Francisco stars ended...
:confused: Huh? The Comprehensive Catalog (Hessler/Chambliss) says it's the USS New York....
Embossing like this is a normal result of the intaglio printing process. But it does tend to flatten out pretty quickly once a note gets into...
I'm not sure where you're looking, but 2003 $5 stars were printed for Philadelphia, Chicago, and San Francisco (and not Dallas). This serial...
The person posting on the other site appears not to know what he's talking about; he also says that a bill with all four corners torn off is no...
For example, this link seems to have been making the rounds lately. Good timing, that.... :cool:
I don't think gold certificates were ever actually demonetized; you just had to trade them in for other currency. They're still worth face value...
Separate names with a comma.
