I know this is stretching the Pre-WW2 specifications for this thread (but being from 1943 and 1944 these ain't no Post-WW2 issues), as well as the 'Bakery' designation, as officially these two cards are ACC classified as 'F' (Food), but I would argue bakers use flour in the baking process, so for the purposes of this thread I have unilaterally declared today as F340 International Centennial Flour Day.
1943 Centennial Flour:
centennialflour1943kats 001 (514x640).jpgcentennialflour1943katsback 002 (516x640).jpg
1944 Centennial Flour:
centennialflour1944gyselman 001 (509x640).jpgcentennialflour1944gyselmanback 001 (517x640).jpg
Brian (the holes seen are the result of a yeast infection)