A judge allowed former lorry driver Ralph Clarke, 101, to remain seated outside the dock as he entered not guilty pleas to 31 charges at Birmingham Crown Court.
It is alleged that he committed 17 indecent assaults, 12 offences of indecency with a child, and two attempted serious sexual offences between 1974 and 1983. The offences relate to three children.
During the 40-minue hearing, Clarke turned down the offer of a hearing loop, telling the court clerk his own hearing aid had a new battery.
The pensioner, from Erdington, Birmingham, was told that six witnesses are due to give evidence at his trial, which is expected to start on 5 December and last for around two weeks.
Clarke wore blue trousers, a beige jacket and wide-rimmed, yellow-tinted glasses.
He used a walking stick and a hand-rail to support himself as he left court on unconditional bail.