Bombay Presidency, Mumbai Mint, Copper Dam, In the name of Muhammad Shah, Obv: sikka mubarak muhammad shah badshah ghazi, Rev: sana julus zarb mumbai at bottom, 20.5g, 22.40mm, Unlisted type, about very fine, Extremely Rare.

 Refer the article by Dr. Paul Stevens in JONS, Unpublished in most reference works. It is rather intriguing as to why this issue was struck with this Persian script design when all the other copper coins of Bombay had English designs by then.