This one is quite familiar to Forties film fans, and I don't need to go into much. The story's famous: guy is poisoned on a business trip, spends his last few hours tracking down his killer. This involves running through some wonderful locales in old San Francisco:
On the internet I learned they played a commercial for the diamond store in the opening moments of the movie "Zodiac." Apparently they advertised a lot: the diamond store with a heart! Other scenes, thanks to the beat-to-hell print, are more dreamlike; can't tell where this might have been.
Edmund O'Brien gives his best performance ever here, it's a role Hitch would have given to Cary Grant, who wouldn't have been half as good. O'Brien is sweaty and desperate, and not in a mood to make friends. The smaller roles are fine, too, including a grinning sadistic killer who tracks our hero to a drug store. He's not wearing clothes, either:
Well, no. I just like the picture. The druggist is selling big bottles of liquor, you'll note - they could do that then. Nowadays, no. We can't sell alcohol here! This is a drug store!
Blade-Runner-fan alert: the last scene takes place here.