Bullion Engineer Special Brigades patch

Here's a photo of a very nice and unusual bullion Engineer Special Brigades patches I picked up on an Ike jacket recently.  This design was worn as a pocket patch by Soldiers who completed Amphibious Engineer training from mid-1942 until mid-1946.  At that time it became a unit shoulder patch, worn by Engineer Special Brigades.  These special units had a focus on amphibious engineer duties.

The example shown here is worn on the shoulder, so it dates from after June 1946.