United States 48 star flag.
This type of flag was mass produced for the home market.
Made of cotton sheeting, this flag is marked Lexington Reg. U.S. Pat. Off. Fast Color, 4x6.
Lexington was a brand name for cotton sheeting introduced by Annin & Co. during the Great Depression as a lower cost alternative to cotton bunting.

From the Louise Veninga Collection

ZFC Collectible Flag