This film itself is a copy of the 1966 black and white Bengali classic "Galpo Holeo Satyi" directed by Tapan Sinha. Hrishikesh Mukherjee (and Guljar) have time and again remade Bengali classics into Hindi movies, sometimes very people are aware of them.
Another gem is "Chupke Chupke" which is a line-by-line copy of the 1971 Bengali film "Chhadmabeshi" starring Uttam Kumar.
Some of the other copies include Angoor (Gulzar) which was a remake of Bimal Roy's Bhranti Bilas. The original inspiration is of course the bard's "Comedy of Errors". Another one is "Mere Apne" (Gulzar), based on Tapan Sinha's "Apanjan".
Another gem is "Chupke Chupke" which is a line-by-line copy of the 1971 Bengali film "Chhadmabeshi" starring Uttam Kumar.
Some of the other copies include Angoor (Gulzar) which was a remake of Bimal Roy's Bhranti Bilas. The original inspiration is of course the bard's "Comedy of Errors". Another one is "Mere Apne" (Gulzar), based on Tapan Sinha's "Apanjan".