Model Types ModelDel'dFromTo Sikorsky S-55 List of Aircraft Model C/N Built ID S-55 0879 1955N741A : Sikorsky S-55 c/n 55-879, ff:?; del CalCo as N741A, 07Apr55; stat ... S-55 0880 1955N742A : Sikorsky S-55 c/n 55-880, ff:?; del CalCo as N742A, 07Apr55; stat ... S-55 0928 1956N749A : Sikorsky S-55 c/n 55-928, ff:?; del CalCo as N749A, 28Feb565; sol ... S-55 0939 1956N750A : Sikorsky S-55 c/n 55-939, ff:?; del CalCo as N750A, 27Mar56; stat ...