Very nice work cochise! (And Mark.) And what I'm about to say in no way diminishes this…but these are the sort of things you know about your team as a fan.
As a "1964" card, it's logical that Topps would be using a 1963 photo of Graham. But the Mets didn't have numbers on the front of the 1962-1963 uniforms. And, even if you postulate that this was a "late series" card issued in August with a 1964 uniform, the 1964 (and 1965) unis had a special World's Fair/Shea Stadium sleeve patch, in place of the regular Mets logo you depict. This particular combination (number on the front, Mets logo on the sleeve) didn't debut until 1966; Casey never wore that. (And neither did Wayne Graham.)
Here's Greg Goossen modeling a 1964-1965 Mets uniform, as an example:
And here's Chris Canizzaro in a 1963 uniform (no front number, no sleeve patch of any kind), for comparison:
And, finally, Darrell Sutherland in the 1966-1973 combination shown on the card:
Again, just nitpicking brought on by fannish attachment. My admiration for the quality of the work still stands. Thanks again.
(And RIP Pascual! So sad.)