OK 1st of all it It's not the same As other Kennedy half dollars I dose have the die mark by the 4. And All around the Reverse of the coin We love your info and your input
You don't have a 64 SMS. These coins were found in the estate of a former mint director 30+ years. None were released or sold through the mint. Unfortunately, this is the stuff that " get rich from pocket change" YouTube charlatans never tell you. They just want clicks and have no interest in educating new collectors.
On the SMS, the 4 of the date has a “teardrop” feature/die chip hanging from the right end of the 4’s horizontal crosspiece. @Oldhoopster explained why it can’t be an SMS, but there was a very recent post about this exact subject. Try using the keywords “Kennedy” and “SMS” to locate it…imo…Spark