What is the backstory of the Sai Baba photograph that was given to Dixit and Madhavrao?

According to Chapter 51 of the Shri Sai Satcharita, the portrait that Kakasaheb Dixit encountered had a special history. It was a photograph that Baba's devoted disciple, Megha, used to worship with great love, regarding it as the three-eyed Lord Shankar. The portrait had been sent from Shirdi to Nagar for repairs because its glass had broken. After being repaired, it was kept covered in Mirikar’s drawing room. Balasaheb, who was in possession of it, entrusted it to Madhavrao and Dixit for its journey back to Shirdi, making its appearance a miraculous event for Dixit.