select issue_date from stamps,paper_master,printsize_master where stamps.issue_date!=''  and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked adhesive Gravure coated stamp paper' and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.71 x 2.3'   and issue_date!='' order by issue_date