Duncan McGee (23/12/1937) of Mansion Drive in Liverpool was found guilty of 17 counts of rape and indecent assault and was sentenced at Manchester Crown Court on Monday 13 January 2014.
McGee also signed the sex offenders register for life.
Between 1967 and 1974 McGee targeted three children, two boys and one girl, between the ages of six and 14 in south Manchester.
Over a period of seven years McGee raped and indecently assaulted them.
Detective Sergeant Suzanne Keenaghan based at Wythenshawe Police Station said: “McGee is a sexual predator and got his kicks out of abusing those who are vulnerable. He continuously assaulted these children at whatever opportunity he could take and made their young lives a misery, ruining their childhood.
“However, despite suffering for years, the victims showed bravery in coming forward and reporting what had happened to them to police which led to McGee’s arrest in January 2013.
“This case proves that we will take all reports of abuse seriously, no matter when it took place, and we will thoroughly investigate the claims of victims. It also proves to those committing the crimes that we will leave no stone unturned and justice will eventually catch up with you.”