Jeepers, I've never seen Whirlpool-branded cabinets before! Given that D&M made the early WP dishwasher, could these have been cabinets made by American Kitchens (aka AVCO) for Whirlpool?
They don't have those bulging under counter drawers like American Kitchens Cabinets, but that is just a matter of styling. Those big chips certainly indicate the sink got hard use like it was used for washing engines or anvils, with those nice wide bowls. I would hesitate to buy anything mechanical from the people who battered this sink.