Hi I past true many 1964 25 cents, of any kind except SMS which I do not have.
This coin it is 6.19 gr. The left a proof 68 cert is 6.21 gr. and the right it is 6.26 gr. It is in the center. It is more whitely and has 875 AG (silver).
The head of the President put me question because do not fit wit the others, and also IN GOD WE TRUST. Could be also an transition? do on previous planchet?
Could be a new fake on the market?

The second image is with an MS65 to compare:
