Wemco 6x6E Centrifugal Pump Casing 6x6" Flanged Cast Iron 31123CD

New old stock.  Has rust from storage.
6"x 6" Flanged.  11" Flange OD.
We don’t know what exact pump this fits.  Casing is stamped 31123CD.
12-1/2" Bolt circle on pump mounting.