The 85-year-old slammed down the book she was reading to race to granddaughter Rikki Bennett, who elected to stay with her grandmother last Friday rather than return to her Barnawartha home sensing her latest bub was close to arrival.

Ms Bennett had been assured the birth was still two days away, but at around 11.30pm the real-life emergency started to unfold at the West Wodonga residence.

Cool in a crisis, "Super Gran" stepped up to the plate to deliver Logan Peter at 12.55am, weighing 3.2 kilograms.

Ms Bennett's mum Jan and daughter Summah, 13, were also present, but had no time for a mad dash to the hospital.

"I've had five babies of my own and none like that," Mrs Looker said.

"I had seen births on the movies, but this was nothing like the movies.

"Jan tried to ring the ambulance, but she didn't have her glasses on and also couldn't work out how to use my phone.

"At one stage she came in and asked me how to use the phone and I said 'Jan, I'm busy at the moment'."

In a further complication, Logan was born inside his amniotic sac (en caul) which happens only once in around 80,000 births.

Mrs Looker calmly peeled the sac over Logan's head before discovering the umbilical cord was wrapped around the baby's neck twice and also had to be carefully released.

She doubts her 15th great-grandchild would have survived if Rikki went to hospital for the birth.

"He was blue and I put him on my left hand and patted him on the back," Mrs Looker said.

"After a little bit he cried and it was the best sound I've heard in my entire life.

"I'm off a dairy farm and delivered calves, lambs, dogs and cats, but nothing like this.

"I only hope I live to hear him talk.

"He will be special, but I won't love him any more than the others."

The birth took 15 minutes before mum and son went to hospital by ambulance and Mrs Looker returned to the book she was reading.

She and her late husband Vern moved to Wodonga from their Upper Murray dairy farm nearly 30 years ago.

Mrs Looker, a keen golfer, and twin sister Margaret are the youngest and only surviving members of her immediate family.

Ms Bennett and baby Logan were released from hospital following their remarkable experience on Monday.

She said her grandmother was remarkably cool in a crisis.

“She was absolutely amazing and there is nothing she can’t do,” Ms Bennett said.

“I remember looking at grandma and thinking why is she so calm.

“The next thing I remember was her rubbing him vigorously with a towel and then he screamed.

“I yelled at grandma and asked if he was dead and she wasn't talking.

“She was just in this mode of concentrating and pulling things off his face and from around his neck.”

Ms Bennett said she began getting contractions around 2pm on Friday.

After collecting her daughter from school, she decided to go to Wodonga hospital but was assured the baby wasn’t coming.

As the contractions were happening she still found time to sell her Jeep Cherokee.

On a follow-up visit to the hospital around 11pm she was given some pain relief and then returned to her grandmother’s home.

“The last thing I remembered was walking out to the car,” she said.

“An hour and a half later I woke up screaming.

“Grandma walked in and I pushed and she caught him.

“That was it.”