The drawing for Measure 31 Design 23D for the Cassin class destroyers; the original was dated May 18, 1944. The vertical colors were: dull black (BK), ocean gray (5-O) and haze gray (5-H), standard for Measure 31. The bow patterns on both port and starboard are very different from earlier Design 23D drawings. These changes were apparently not enough to justify a new design number. I have found no evidence any destroyer used this design.