Supplement no.3. to Army/Air Operations Pamphlet no.4 (chapter 3). Army/Air Operations Pamphlet. Carriage of Vehicles bij Air. Section 4, Q.F. 25 Ponder. Mark 2, Gun … Part List for Ordnance 25 Ponder, Marks 2 and 3 on Carriage 25 Ponder, Mark I also Trailer, Artillery, no. 27, Mark WO 3665 - … Army Air Operations Pamphlet. no.4, (Chapter 3), supplement no.3. Carriage of Artillery Equipment by Air. Section 1, Q.F. 25 Ponder, Mark 2 Gun on Carriage …