We bought the golden pair - the League Championship and FA Cup medals from 1961 - at auction at Sotheby's last week.
The medals will now form the centrepiece of our proposed new museum at White Hart Lane.
The inspirational midfielder was the heartbeat of Bill Nicholson's famous team - the first to clinch the double in the modern game.
He played over 300 games in total in that golden era as we added two FA Cups in 1962 and 1967 and the European Cup Winners' Cup in 1963.
Talking from his home in Nottingham, Dave enthused: "It's great news, absolutely brilliant. I'm chuffed to bits that the club have got them.
"In my mind that is exactly where they should be. The medals are going back to where they belong. In a way they are going home."
Legend Dave, 60 this year, still occasionally comes down to the stadium he graced so many times. In fact, a full house gave him a rousing reception when he last appeared at Bill Nicholson's Testimonial in August.
And he joked: "I'm sure I'll go and have a look at them again myself - I might even try to pinch one back!"
Dave Mackay has expressed his delight that his double-winning medals have ended up back at the club.