I'm not trying to be nit picky, but rather just trying to address a common misconception. A scale being digital does nothing to ensure it's accuracy. My bathroom scale is digital, and can I assure you it would do a very poor job of weighing dimes. I see this all the time on FeeBay. "We use digital scales for accuracy". Digital readouts simply make it easier for people to read the weight reported, and often lead to a false sense of accuracy.
Mine does a poor job of weighing me. Keeps saying I'm 50 lbs heavier than I know I am. Then the wife tells me not to weigh myself after a night of beer drinking with the boys, so I waited a few days and sure 'nuff, I lost the 50 lbs.
Sooner or later , if you do not have a good balance, you will consider buying one. Most evaluate possible purchases by cost, range, and resolution. But many sellers ( also with eBay) do not give enough information to tell you whaat the electronic balance can do. The old triple beam analog was not as easier to use, but it didn't play Analog/Digital conversion tricks. This is the page to read before you buy, as it discusses every term you might run into about balances. http://scalenet.com/applications/glossary.html
Several times you have said you weighed it against a silver dime and it weighed the same but nowhere have you actually said what it weighed. If you are going to ask about something like this the absolute first piece of information we will need is the actual weight of the coin, in grams, to at least two decimal places.
i sadly dont have a scale that weighs in at least to gram decimal places, i sorta eyed out where each one was. and i also used balance that i made it worked when i weighed a silver dime against against a 1975 dime.
i think, my uncle owns a shop called phantom finish, and he paints guns. do u think that he may have one?
For that to work, you should use another silver dime which should weigh the same as the one you're checking the weight of to see if it is a 65 dime struck on a silver planchet. Silver does weigh more than the clads.
You could ask him, not sure if he uses a scale that goes into gram weights for painting guns, but it wouldn't hurt. If he doesn't as Blaubert said, ask him if he knows any of his customers who re-load their own ammunition as they would have a scale for measuring the powder in grams.
I will repeat, any college and many high schools will have chemistry departments that will have balances that will weigh to a tne-thousandth of a gram X.XXXX If you go and ask, they would be happy to weigh it for you.
Besides books, a scale is one of the most important tools for any coin collector. You can get one that is capable of doing the job for around $15 on the 'Bay. You would do yourself well to pick one up for this coin and future use. Mike
A surefire way to determine if your dime is 90% silver is to perform a SG (specific gravity) test on it. But a SG test requires a scale which the OP does not have.