Here’s a real estate ad from the August 7 1936 edition of the Toronto Daily Star:
The typesetting in “extraordinary opportunity” looks strange, but then I realized what had happened. The typesetter needed to try to fit both words into the space provided for the ad, but was a bit short, so he or she compromised by using the slightly narrower digit 0 instead of the letter O. If you look at the third line of text, which uses the regular letter O, I think you’ll see it.
Gloucester Grove is actually quite a long street, and some of the properties have been remodelled since 1936, so I’m not sure whether the bungalows offered in this ad still exist. These houses might be likely candidates – as the ad states, no two of them are alike.