And this advertisement is from the July 1964 issue of the infamous Oz Magazine
The building, 147 King St, still exists, but there is no longer a business called "Formal Wear" in Australia. The shop is either a Chinese Restaurant or a Porsche Design shop now, and phone numbers went to 7 digits in 1986 and 8 in 1994.
Oz magazine was started by a bunch of students at Sydney University in 1963, endured obscenity trial after obscenity trial, and eventually folded in 1971. I can cope with what they did to Rupert Bear, (just), but a lot of other people couldn't.
The full archives are available for your viewing pleasure
. And from them as can do the maths, shaddup.