National Laundry Building, 1925
This is very hard to read but I was able to make out (through the magic of Photoshop) "S.H. SAMMONS" across the top, and "NATIONAL LAUNDRY" in big red letters. The old sign is on the west-facing wall but the south and east walls feature some neat cast concrete ornamental reliefs. Take a look at SE Clay between 8th and 9th.