Sheet metal parts are numbered with this pneumatic numbering machine in North American’s sheet metal department, N[orth] A[merican] Aviation, Inc., Inglewood, Calif. - from our story 'Building the ‘Arsenal of Democracy’: Alfred T. Palmer’s Extraordinary Wartime Color Portraits'

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Sheet metal parts are numbered with this pneumatic numbering machine in North American's sheet metal department, N[orth] A[merican] Aviation, Inc., Inglewood, Calif.

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