I had a beddy whip x in 19 70, two quid off of ken gould  Sutton bonnington 1970 . The dog was not very good in the day but at night I never saw him beat , lads came down from Derby,Notts,shrops,london to have a bet and the all got pasted but to be fair they brought coursing dogs and mine was a pure lamper, I don't know how that old dog would match up to the current world beaters but I suspect he would have held his own