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 … Handbook of the 40 mm. 2 Ponder Automatic Gun. Marks B* & C*. (Ordnance Q.F. 2 Ponder Marks I & II. No. 53400 G - …