OK -Charles Manson, American Criminal

For years I thought this postcard said, “Check, OK,” but after a friend encouraged me to look up Manson’s signature, I found that it says, “Chuck,” with a strange symbol he used often, after. Does it say, “OK”? Or is that a creepy eyeball? The hair stood up on the back of my neck when I realized he had actually written me back. There was no other accompanying material, so there is no insight into his thoughts or question.