Lot of 2 Audubon Birds of America 1937 Book Plate Matted Back Ready To Frame

Lot of 2 Audubon Birds of America 1937 Book Plate Matted Back Ready To Frame Two sheets with 4 pages , a total of 4 images. First sheet has European company on one side and Manx shearwater on the back. Second sheet has Barnacle goose on one side and Buff-breasted sandpiper on the back. Sheets have normal tanning and foxing that would be found on a book printed in 1937. I have provided a closeup of the most obvious mark. Please use the photos and enlargement feature as part of the description and for the measurements and condition. Matted and with a backing so they are ready to be framed. Stockoffice2525ebp