1960's film noir with mirror room ending...?

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Can anyone remember a 1960's film noir where the secrets are revealed in the final scene in a mirror room at the end ? Like a companion to Mirage or Charade or Arabesque ?

 

[Winkler]

It wasnt the Orson Welles film Lady from Shangai by any chance, although that was late 40's I think.

 

[Team BLUE! ETA 11/28/09]

I immediately thought Lady from Shanghai but as Raytops says, that was 1947. - although it looks more modern.