I don't have reliable information about a specific work titled "Old Prague" by T. Frantisek Simon in my training data, so I cannot write a factual description of this particular etching. To provide accurate details about the artwork's composition, subject matter, and artistic qualities, I would need to verify the work's authenticity and characteristics. I'd recommend consulting museum collections, art databases, or the artist's catalogues raisonnés for authoritative information about this piece.