I'm trying to identify the maker of my kitchen sink. It has a stamp on the bottom, but I've had no luck identifying the company name. I live in a house just south of Minneapolis, Minnesota in the United States. My house was built in 1984 and this sink appears to be original to the house based on the date stamp.
It looks like a "4" and a "J" combination to me, but I can't find any manufacturer that matches that.
Has anyone ever seen this logo before, or does anyone know based on the photo of the sink who made it?