Steve Jelf made these signs mostly in 26" and a few 36" if I remember correctly back in the late 70's up until he sold the business to Weathertech the floor mat folks 10 - 15 years ago they sold it to the Signpast company that went out of business about 2 years ago. Steve never marked the front of them just the back was marked with a manufacture name and date sticker and or an ink stamp that was easy to remove.