The "Chicago brewer" mentioned in the add is Manhattan. Directly below is a label from a picnic bottle that shows all the offending characteristics described in the article. Below the article is a label that shows how Manhattan chose to comply. Its interesting they replaced the state of Wisconsin with a pine tree. Notice the label blacked out "Whitewater Wisconsin" and included the Chicago distributor "branch office" information. I'd love to see what was actually located at that Western Avenue address! Also, the ANNUAL REPORT OF THE FEDERAL TRADE COMMISSION FOR THE FISCAL YEAR ENDED JUNE 30 1944 mentions the following case pending in the courts: "Manhattan Brewing Co., Chicago.--Seventh Circuit (Chicago), misleading use of words “Canadian” and “Wisconsin” in brand or trade names for beer or ale not brewed in Canada or Wisconsin.".
While this case is years after the 1938 "agreement", it could the case was to collect damages for the original misleading use mentioned in Ed's article or continued misue - even the mandatory can is misleading with its use of "WHITEWATER BREWING COMPANY WHITEWATER WISCONSIN" in a prominent place on the front of the can.
Also check out the Cream Top page to see a couple bottles that "comply" with this ruling.