Scrum-half Dwayne Peel made his Wales debut as a 19-year-old

At 25, the Llanelli Scarlet will have achieved the feat at a younger age than Wales scrum-half greats such as Gareth Edwards, Robert Jones and Rob Howley.

"It's credit to Dwayne and the way he's looking after his body, these games are tough encounters," Edwards said.

"It's a wonderful milestone and well deserved for an outstanding player."

Edwards won 53 caps for Wales, while Howley holds the record for a Welsh scrum-half with 59.

Fitness allowing, Peel - who also has three Lions caps - should pass Howley's mark this year, but Edwards expects the Scarlet to win far more.

"I've enjoyed watching him play over the last few years and Dwayne just seems to be getting better," added Edwards, speaking on BBC Radio Wales' Scrum V programme.

"I don't think it will be a long time before he gets 100 caps, so good luck to him."

Scotland probably throw it around more, a bit like us Wales scrum-half Dwayne Peel

Saturday's clash at Murrayfield will see Peel become the 17th Wales player to join the 50-club.

He will be the fifth in the current squad, along with skipper Stephen Jones, Gareth Thomas, Martyn Williams and Colin Charvis, and expects it to be an emotional afternoon.

"It's a special moment and I'll be very, very proud," Peel said.

"I was capped when I was 19 - as a replacement against Japan in 2001 - and there has been a lot of rugby since then.

"We have experienced some highs and lows in that time.

"I think we went 10 games without a win but there have been the highs, with the Grand Slam two years ago."

Wales will be out to put behind them Sunday's opening 19-9 defeat to Ireland.

"It's another challenge for us on Saturday and we will play against a Scottish side who will have their tails up after losing to England last Saturday," added Peel.

"We can take the positives out of the Ireland game but we will also take the negatives from the defeat.

"Scotland are totally different to Ireland. They probably throw it around more, a bit like us. They like to get the offloads going and that's when they can be dangerous.

"We have to combat that and make sure our defence is right on the money.