The series was only one day old (14 Dec 1979) when controversy erupted after Australia's Dennis Lillee walked to the crease carrying an aluminium bat. Australia were 219-8 when Lillee took to the crease with his ComBat and hit his fourth ball from Botham for three runs. The metallic "clunk" of the shot gave him away: Brearley complained to the umpires that the bat was damaging the ball, while Lillee argued there was nothing in the laws to say a bat must be made of wood. Fired up, Lillee bowled brilliantly for the remainder of the match.
Arguably the finest Australian batsman of his generation, Chappell had been outstanding in Packer's World Series and now resumed the national captaincy for the first time since losing the Ashes in 1977. Annoyed that the ball Lillee played for three hadn't made the boundary, he sent 12th man Rodney Hogg out with a wooden bat to replace the aluminium one. Lillee refused it, and Chappell had to come down from the dressing room himself. Lillee eventually gave up the metal bat – throwing it 40 feet towards the pavilion. -- Emma John
In 1979, in a test against West Indies, Dennis Lillee used the aluminum ComBat. That was not against the rules and this particular bat was already being bought by schools because of its durability. 12 days later, he used it again, this time against England on the fourth day of the first test at Perth. When he straight drove a ball by Botham for 3 runs, GregChappell thought it would have gone for a 4 with a conventional bat, so he brought out a wooden bat for his mate. Meanwhile, English captain Mike Brearley complained to the that the metallic bat was damaging the cricket ball. This led to a heated discussion following which Lillee, in apparent disgust, threw "the offending lump of metal fully 40 yards towards the pavilion." An act for which he was let off with a warning. -- dreamcricket.com
Youtube video of Lillee's ComBat.