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Summary
DescriptionIngrid Bergman The Constant Wife 1975.JPG
Photo of Ingrid Bergman as Constance Middleton from a revival of the play The Constant Wife.
Date
There is a typed date of May 1, 1975 on back. Even with the stars involved in the venture (Sir John Gielgud directed), the play lasted on Broadway only from to May of 1975.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.