W7 1024 Briquette tram (Was National Bank and ad tram
  Tram Gunzle

William, your photo of W7 1024 advertising briquettes is on Flinders St,
outside the old Customs House between William and Market Streets.

The photo from Steve Ohlsen showing the National Bank cannot be 1973, as
the illuminated advertising trams did NOT have fluorescent tube lighting
until after March 1977 - as attested to by the photo of 1024 in the
Centenary cricket test livery.