Quick view Add to Cart Modification of T-28A to T-28D, Incorporating R1820-56S Engine and Increased Armament Capability [nov728stocs96] Document Part Number: T.O. No. 1T-28A-544C Number of pages: 8Part Number: T.O. No. 1T-28A-544CRevision Date: 10-May-1965 MSRP: Was: Now: $15.00