A Wrought Iron spring lock and key. A similar lock is pictured in Schiffer's ANTIQUE IRON, SURVEY OF AMERICAN AND ENGLISH FORMS, fifteenth through nineteenth centuries. They identify it as PA., possibly Moravian, late 18th C- early 19th C. They indicate that there is a flat plate that fits against the inside of the door. I hope the pictures show the detail of the decoration on this iron work. It is 3 1/2 inches lg., 1 3/4 inches w. This piece is also out of the 30 year old collection of the retired antique dealers from St. Louis, MO.