I don't have reliable information about a specific work titled "Untitled" by Bimal Dasgupta in my training data that would allow me to write a factually accurate description. To provide you with an art-literate and truthful response, I would need to verify details about this particular painting, such as its date, dimensions, subject matter, or exhibition history. I'd recommend consulting museum collections, artist catalogues, or verified art databases for accurate information about this work.