brass plaque

Rectangular brass plaque; mounted on brass plate; positive image of sail plan, complete with measurements; spinnaker, mainsail, jib, mast; starboard outboard profile; engraved on top "[IC] PLAN IV/ SAIL PLAN"; engraved on bottom "INTERNATIONAL ONE - DESIGN CLASS/ OF/ LONG ISLAND SOUND/ 1-1-65 F.F.B"; on reverse in diamond logo "REG U.S./ PAT. OFF./ U.S.A./ U.S.A./ TRADE/ MARK/ BRIDGEPORT/ BRASS/ CO."; from Roderick Stephens collection.