That my is an old Strato cloud,1.5 oz fabric...the rings as slider stops,the line attach point s( type 4 coreless nylon,covered by a piece of 1.5 inch type 3),the windows on the bottom surface AND the dual bridle attachments ,not to mention the zig zag stitching using FF red thread,.ITS ALL PARAFLITE!. I KNOW CUZ I WORKED THERE. The serial number was stamped on one of the ribs,since these ribs are all black,you will find the serial number on one of the reinforcing tapes on the rib.it may no longer be visible because the ink PFI used at the time was NOT permanent