Got these back as change recently. The nickel looks like a Delaware Quarter pattern on the obverse and a cent pattern on the reverse. The dime looks like it was struck on a cent planchet.
Glue or adhesive on the Nickel and a Penny was stuck to it. Give it a "Acetone" bath and that will take it off. The dime looks like a "Spooned" Coin.
The dime may have been stuck in a dryer or spooned to get the edge looking like that. A cent planchet won't fit in a dime's minting setup. The Nickel was squeezed between a quarter and a cent in a vise. Notice how the letters from the other coins are reversed? Looking again, @SensibleSal66 is probably right about the residue on the coin. Glue was added and the other coins pressed into that.
Thanks for the replies. The nickel clearly has some sort of glue on it as you can see and also feel. Never saw a "spooned" coin before so that was enlightening. Think I will hang on to them just for novelty sake.
I just received a "spooned" dime from the manager of my credit union. He knew it was novelty but not how it was made. I explained it to him and he gave me the coin, along with other foreign coins that were his reject change counting machine. You can clearly see each hit on the rim of the dime.