Also, although I am not certain about the 9", the early 10" up until sometime in 1942 had a name plate with either Atlas or Craftsman on it on the rear of the bed retained by two round head drive screws. Sometime in 1942 the name plate was moved to the right end of the bed and what was stamped or engraved on it was changed. The retaining method remained the same so if the plate was removed to repaint the bed and in many cases never reinstalled, at least the two holes are there. Prior to 1942 the serial number was stamped into the top right of the front way along with some other things like the model revision letter and and the type of counter shaft (V for Vertical or H for Horizontal, usually). From sometime in 1942 on, the serial number was stamped on the nameplate..