Vtg 30x18 Mid Century Cast Iron

Vintage mid-century cast iron white porcelain single basin drop-in kitchen sink. The manufacturer is unknown, c.1940s. It shows normal wear, there are scratches & scuffs, some pockmarks, few stress lines in the corners of the basin, distressed porcelain around the outer edges (most of that would be covered if a stainless steel trim ring was used for installation, new ones can be found online), and some light staining. Overall good, salvaged condition. Please be sure to look over all of the pictures as they are the best description. Feel free to ask questions when needed. Thanks for looking!
Measures approx.:
Overall - 30 1/4"wide x 18 1/8"depth
Basin - 27"wide x 15"depth x 6"deep