There was also a J B Young in Queanbeyan
JB Young's store at Eastlake (Kingston).
And one on the corner of East Row and Alinga St in the City. I bought my Campbell High School uniform there in 1985.
They look very similar, but they are different corners: J.B. Young's was on the corner of Giles and Jardine Streets, while the new photo is the corner of Giles and Kennedy Streets. The store had a second floor added in 1961, but you can still the the little vents on the corner and the clerestory windows - https://www.google.com.au/maps/@-35.3147488,149.1415676,3a,75y,207.2h,85.84t/data=!3m7!1e1!3m5!1sAdv-ER-MzcGaJSs8j5tqzg!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DAdv-ER-MzcGaJSs8j5tqzg%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D244.6783%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
Discovering Mildenhall’s Canberra
is a joint project between the
Museum of Australian Democracy at Old Parliament House
National Archives of Australia.