That badge appears to date the drum from around the early 1930's to the start of WW2. After the war the city on the badge would be Elkhart. The white enamel badge first appears around 1933-4? There may be a date stamp inside the drum, two digits for month and two for the year.
I'm pretty sure the white badge started in 1936 with the Anniversary. There were some transitional drums like this one dated early 1936, that still had the old version.