Get out your notebooks and pencils – because it’s Electronic Saaaaales and Rentals! 6-4-8-oh-1-double-oh!

This sparkling time capsule harks back to a pre-smartphone world when memorising landline numbers was a skill, renting TVs was normal, and being open seven days a week was a selling point.

Why five dancers in sequins belting out a 1940s-style jingle? Who knows – but it worked. If you watched Sydney TV in the early ’80s, chances are you could rattle off 648-0100 as easily as your own number. Proof that a low-budget ad can score a high impact.

Other spots featured film critic Bill Collins and actor Joe Hasham, whose groundbreaking gay lawyer role in Number 96 was a landmark in representation on Australian TV. That magic number certainly didn't hurt the Canterbury-Bankstown Bulldogs – 648-0100 was emblazoned on their jerseys in 1980 when they won the NRL Premiership.