These particular bread advertisements date from March 1939 and appeared in the North Platte Daily Bulletin, a newspaper located in Nebraska. Seven ads have been found, one for each dwarf, though usually only one per day.
Images from Filmic Light Collection.
These same bread ads were also printed on classroom ink blotters. See a Dopey version in a another post.
The North Platte Daily Bulletin used pink paper for their comics section, hence the reason for the color of this Grumpy ad.
The ads were run on multiple occasions. Happy is shown below in newspapers from different days.
Additional images from March 15, 1939 via North Platte Genealogical Society.