Jaffer Brothers Motors was the next to Rex Cinema. Rex Cinema is now replaced by Madina Mall and further west by Jainab Market.
The Musical Fountain intersection was a landmark of Karachi being situated at the intersection of Victoria Road, Musical Fountain Road and Stratchen Road (now Din Mohammed Wafai Road). At the intesection is the famous Holy Trinity Anglican Cathedral and the Trinity Girls Degree College. The fountain is gone and replaced by a more traditional architecture and called Fawara Chowk.
The chowk appears in Pakistani films like the famous donkey cart song with Waheed Murad and Zeba. (Mujhe tum se mohabat hey, ek baar zara tum keh do).
Please suggest any other information and your memories about this round about in the comments section. Thanks
Amin H. Karim