Ladder Serial Number

Not a ladder note as the term is generally defined.



to the CCF!

Hello and welcome.

What you have is "almost" a ladder. Meaning that it's "almost" interesting, and almost valuable. But sadly, it isn't.

The reason is grounded in statistics. "True ladders" are rare because, in a seven-digit sequence running from 0000001 to 9999999, there are just four of them: 0123456, 1234567, 2345678 and 3456789. Add four more if you include the reverse ladders (6543210, etc). So that's an 8 in ten million chance of finding one - rather low odds.

An "almost a ladder", however, is much more common, because there are thousands of ways you can "almost but not quite" get a ladder number: 0122456, 0124567, 0123546, and so on. Let's say ten thousand possible almost-ladders. That's a 10,000 in 10,000,000 chance of finding one, or one in a thousand - still kinda low odds, but nowhere near low enough to make anyone pay any attention - or any extra cash.

So unless the note is slab-worthy for other reasons, I would advise against it.