Company Update Keystone Realtors Ltd - 543669 - Notice of Offer for Sale of Shares by Promoters & … BSE India Notice of the proposed offer for sale of equity shares of face value of .10 each ("Equity Shares") of Keystone Realtors Limited (the 'Company') by its promoter(s), Boman Rustom Irani, Percy Sorabji Chowdhry and Chandresh Dinesh Mehta (collectively the 'Sellers'), through the stock exchange mechanism (the "Notice").