The OS has been modified to use 2-5-0-0 (two five oh-oh) and 2500 is pronounced twenty-five hundred. I couldn't work the prefix designation SC into the OS, so I omitted it and shortened the song by 1 verse. This is about the German SC2500 kg bomb carried by the He-111 aircraft early in the war against London. The Germans also had an experimental SC3000, but I've never seen a pic of it nor the 17 ton monster tested with a Me-323 that ended in disaster! Britain would later drop 12,000 lb Tallboys and 22,000 lb Grand Slams on Germany. Since Germany relied on twin-engine bombers they never could carry oversized bombs unless slung. In the end several 4-engine bombers were under construction but most of these would carry a combo of bombs and ASMs on the wings.

http://upload.wikimedia.org/wikipedia/commons/e/e3/German_SC_2500_bomb_1940.jpg http://www.48specialmodels.com/48pics/SC2500-pics/sc2500-01.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Bundesarchiv_Bild_101I-424-0280-05,_Flugzeug_Heinkel_He_111.jpg/220px-Bundesarchiv_Bild_101I-424-0280-05,_Flugzeug_Heinkel_He_111.jpg