Contents of the Collection The collection is quite small and only holds four photographs and five clippings. Each of the 8x10" black-and-white photographs are undated and have a number on the front upper right hand corner, ranging from 3421 to 3424. Images depict a knotting sequence and rib stitching. The five clippings are from various issues of Sport Aviation, ranging in date from July 1961 to September 1981. The articles discuss knotting, rib stitching, and aircraft coverings.