Most likely a rolled thin planchet. The only other possibility would be a Philippines 10 centavo planchet the diameter is right 17.9 mm and the weight is very close 2.04 grams, closer than the dime planchet weight. The composition would be 70% copper 18% zinc and 12% nickel which should give it a silver color. Only way to know for sure would be specific gravity or an XRF gun test.
As for the strike through . . . I can't tell from your photo if it is incused or not. If it is raised, it could be a die crack. Should be easy enough to run your finger nail over it and determine which it is.
I did think of another test, the tissue test would probably be able to tell if it was a rolled thin silver or a Philippines 10 centavo planchet.