Hello All,
Most mid-sized breweries from this time period: Schlitz, Pabst, Fitger’s, Iron City Brew, et al, looked like large industrial buildings without many discerning features marking them as breweries.
There were tracks leading in and out of the building(s) but everything, for the most part, was contained within the four walls of the building- -especially in urban settings.
Even the modern Sprecher’s brewery in Milwaukee, from the outside, looks like any other industry in the area.
Larger, more modern breweries: Coors, Budweiser, Miller, have the more familiar specialty buildings; grain silos, brewhouse, bottling plant, storage, and shipping facilities.
The Miller brewery in Irwindale, California, actually has its stainless steel holding tanks out in the open.
In Fort Collins, Colorado, the Budweiser brewery has the traditional grain silos along with a myriad of piping between the various specialty buildings.
Modeling mid-sized breweries of your era, other than the signs on or on top of the buildings, wouldn’t really be unique from other urban industries of the time.
That being said, any multi-story brick building kit could be kit-bashed to replicate the brewery you are seeking to model.
Hope this helps.