Samuel H. Bibighaus was a plane maker in Philadelphia, PA from circa 1840. Rated G+++ and is a user if you are so inclined. Marked '5' on the heel. A really nice Screw Arm Plow Plane.   Arm threads are 99% plus. Very, very minor chips. Brass depth stop adjusts easily. Boxwood arms. Minor repair to bottom of the fence. Looks nice on the shelf. Stand not included.