I was thinking PCGS rattler from the tiny prongs visible in the picture. That said, I’ll guess MS-63, though it would probably grade MS-65 by today’s standards.
Well it's been over 24 hours, so I will do the reveal. Most of you got it right at MS-65. It's in a PCGS Rattler MS-65 CAC. I picked it up on Great Collections and could make out the subtle color in their images. I was very pleasantly surprised to see how it looked in hand.