[CornFed]

Wikipedia, which has never been known to be wrong, says it was 1968, which would be the tail end of the Johnson presidency.

https://en.wikipedia.org/wiki/Silver_cer...ed_States)

Nixon took the United States off the gold standard, so maybe you're thinking of that.

You're absolutely right.  The silver certificate allowed a person to buy a set amount of silver (right?  Hence, the name?) in exchange for said certificate.  Nixon set chaos in motion w/ Bretton Woods, I think, which allowed currencies to float.  Ultimately, that required the price of gold to float.  So, yes, I was thinking of Nixon.

[CornFed]

Wikipedia, which has never been known to be wrong, says it was 1968, which would be the tail end of the Johnson presidency.

https://en.wikipedia.org/wiki/Silver_cer...ed_States)

Nixon took the United States off the gold standard, so maybe you're thinking of that.

You're absolutely right.  The silver certificate allowed a person to buy a set amount of silver (right?  Hence, the name?) in exchange for said certificate.  Nixon set chaos in motion w/ Bretton Woods, I think, which allowed currencies to float.  Ultimately, that required the price of gold to float.  So, yes, I was thinking of Nixon.