ATD 1 and ATD 11 conducted the attack. ATD 1 had tank #s 501, 502 (broke down before reaching the jump off point), 505, 506, and 507. ATD 11 had captured British Mark IVs. Source: The German A7V Tank and the Captured British Mark IV Tanks of WW1 by Hundleby and Strasheim, 1990. The whole issue of only 100 awarded is blown out of purportion IMO. Each A7V held 18-22 persons. With 20 odd A7Vs operational you can start to see where the magic 100 doesn't add up. The Germans also had over 100s of capturd British tanks, of which at least thirty became operational. Each held approx 8 men. Given the three attack requirement (or being wounded) to earn the right to wear the badge I've wondered if the initial 100 were meant for guys still on active duty. There is a good book on the German armored forces from WW1 called "The German A7V Tank of WW1" by Hundleby & Strasheim. Add to that badges made in the 40s for store front patriotic displays.