Personal coin numbers

Is there anyway to use Numista to give my coins a personal number? I mean, If I have 4 US silver war nickels, in various grades, which I paid various prices for. I would like to be able to look at my collection, and know what info pertains to what coin I have entered into Numista. I was hoping to just write or stamp a number on the back of my flips. (I have a number stamp ordered) The problem I see, is unless I make a note of what number I used last, I could end up skipping numbers and/or duplicating them. If I take nickel number #339 then put it in my private or public comments on Numista, all is fine. If over time I sell coin #339, I would like to "search" or know that coin was missing. I see no other way then to keep a seperate spreadsheet that lists the number and coin. Is that understandable? Lets just say I list my US coins 100,000 -199,999, I see no way to know what numbers I have used or haven't used simply by putting them in Numista under personal or private comments, as you can not search your own collection for numbers.
Any input would be nice. I do not want to take all the time involved, just to find out, "there is a tab in Numista, to give your coin a number that you can search" lol .... at a later date.
Thank You
Kevin

If you add your personal numbers to the Private comment box you are right you can't search on it within Numista.

However if you export your collection using the download option on the bottom of the My Coins tab you can then search within the Excel spreadsheet as the Private comments box is included in the download.

Hope this helps a little.

Cheers Mike

As I understand it, all your coins that you enter into your online collection have numbers, but the numbers are not shown to you. The site uses them internally. If you look at the source of an individual coin page, you see something like this:

In this example 482 is the number of the coin type, 27036 is the number of the year or variety, and 25564027 is the number of your coin that you have entered.
But all this more of theoretical interest...