This is what I found out (courtesy of the Metropolitan Postcard Club of New York City) about Americhrome:
This series was printed in the United States using tinted halftones. These cards are characterized by a medium screen pattern, limited pallet, turquoise skies, and small red block lettering. Their soft look creates the illusion of continuous tone lithography. In later years white border cards and a fine textured linen type card were made that continued to carry the Americhrome name but not the old printed characteristics. They were not always published by the American News Company. Prefix M (1910-1941).
note: although my pictures have a white border, the postcard does not. the number is M-3537
Sharing winter on PostcardFriendshipFriday