The one with Paul Scofield and Robert Shaw.
I wasn't aware the Heston did re-make.
Scofield owns the role. If I recall, he starred in the stage play as well.
And since you brought up Charlton Heston, have you seen his version of Treasure Island. It was TV release and it's damn hard to find (or was, this being the interwebs and all). He's a cracking Long John Silver.
And yes, I'm an old man. I was 12 first time I saw it.