FTJWEB04-125 RUNGE patent level. Possibly manufactured by UNION LEVEL, this one is mounted on a board with remnants of the Union label and initials UBA, and UBA also stamped on level above 5/28/18 patent date. Two levels mounted perpendicular on a triangular frame that allows the levels to be adjusted with brass locking screws. Vials wet. Uncommon. (RRT838)