select distinct name, serial_no from stamps,paper_master,color_master,np_master where  color_master.color_code=stamps.color_code and color_master.color='Dark Brown'  and np_master.np_code=stamps.np_code and np_master.np='P'  and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked paper with all over 'Asoka Pillar''