Lawrence "Dutch" Keen

When I got that quarter in change, I thought maybe it was worth a lot of money, but found out soon that it was not. Years later I found a 1901 O quarter in change which I still have though it is not extremely valuable.

No, there weren't. Post this in the coin talk forum or error coin forum with pictures and weights of you can.

One coin weighs 2.46 grams, the other 2.54 grams. There is not much point in taking a picture as they appear the same as usual 1964 dimes or later versions

Then it's silver. If you still think it might be a clad coin, then post this in an actual cointalk forum. It weighs the same as a silver dime and none were ever supposed to be minted in clad.