Keywords: Sheet metal parts are numbered with this pneumatic numbering machine in North American's sheet metal department, North American Aviation, Inc, Inglewood, Calif.jpg en Sheet metal parts are numbered with this pneumatic numbering machine in North American's sheet metal department North American Aviation Inc Inglewood Calif LOC-image fsac 1a35299 Alfred T Palmer 1942-10 PD-USGov Photographs by Alfred T Palmer Photographs by Alfred T Palmer at North American Aviation Inc plant in Inglewood Calif 1942 Oct |