select issue_date from stamps,printsize_master,np_master where stamps.issue_date!=''  and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.8x2 cms.'  and np_master.np_code=stamps.np_code and np_master.np='P'  and stamps.serial_no='0525'   and issue_date!='' order by issue_date