There were only 44 AT-10 built by end May 1942. 41-1711 to 1732 and 1734 to 1755, most initially delivered to Higley. Their cards do not mention Kelly. The first AT-10 recorded as initially delivered to Kelly was 41-9248 in August 1942. The block 42-1711 to 1860 were mostly delivered to Higley or Roswell April to August 1942, while 42-9246 to 9436 were delivered to Valdost or Kelly August and September 1942 . Need to amend the season or hemisphere.